Familial Bonds

A/N: Hi folks. I got at least one question about it in the last chapter, so I figured I'd address it. The power mentioned in the original story path name is what I'd consider the MCs primary ability, but it'd have been more accurate to say he has a range of abilities that build upon one another to give him an exponentially increasing level of influence.

On to the story.

***

Ch 2

14:00 Wednesday

By the time I'd sorted out the clothes to give away to Goodwill, the old Samsung was charged. I put in a call to work. They'd already been informed, and it wasn't any issue to take the rest of the week off to recover and grieve. They knew me and Mason had been close. I appreciated that.

The next call was harder. Mason's wife Leah.

For the first time since I woke up in the hospital bed, my emotions actually broke through the blanket of calm, collected thoughts that had descended over my mind. She sounded so incredibly tired, her voice thin.

I apologized for not pulling him out of the wreck. She assured me it wasn't my fault. We both cried. I asked if they needed anything, but they didn't.

Her folks had driven down to help take care of her and little Evie. The poor kid was just four, and didn't really understand what was going on. Kept asking when dad was coming home.

Mason had life insurance, apparently, and it looked like they'd be well taken care of. I still told her to let me know if there was anything I could do to help.

It was an exhausting call. But by the time I was drying my eyes, and considering heading out to buy some new clothes, there was a banging on my door.

Somehow I could tell it was my sister without even looking through the peephole. Shifting behind the door with nervous, worried energy. The faintest smells of a coffee shop. She hit me like a missile the second I opened the door, hugging me tightly.

"Answer your fucking texts, you moron." Claire's voice sounded choked up as I hugged her back, patting her back awkwardly. "And don't you fucking dare get in an accident EVER again, you hear me?"

I chuckled, despite everything. "Sorry. I was talking to Mason's wife."

She stiffened slightly in my arms, realizing how callous she might've sounded. "I'm sorry, too." A pause. "Is she doing alright? Are you?"

I sighed. "As well as can be expected. They've got family taking care of them. And I made a miracle recovery, did you hear?"

She shook her head minutely, face still hidden in my chest. "They just said you'd stabilized by the time I left. But thank god."

Claire looked tiny to me now, a full foot shorter than me. She had lighter hair, like our mom, almost blonde - pulled up in a high ponytail. Still had the barista outfit on, so I'm guessing she came straight from work when her shift ended.

I wondered how to deal with this. Didn't really want to draw attention to my growth spurt, but it was also pretty impossible to hide. With another sigh, I figured - what the hell - I could probably handwave it.

"I'm so fucking relieved you're okay." She muttered into my chest, and I stroked her back comfortingly.

"Going to take more than that to get rid of me." She snorted quietly. "I was actually going to -" I stiffened, when I noticed it. Underneath the light sweat and various aromas of the cafe suffusing her clothes, I could already smell Claire's growing arousal.

Oh, that was just messed up.

"Going to what?" She prodded, looking up at me. The connection I'd barely noticed forming grew stronger with eye contact. Her eyes dilated slowly, a slight blush on her cheeks, an uncertain squirming against me.

My sister was far less of an actor than the two SHIELD agents.

"Going to head out. I need to buy some new clothes. I had a bit of a growth spurt recently." I tried to ignore the growing tension of the situation.

"Okay. I'll come with. Just let me change quickly." Claire released the bearhug reluctantly to pick up her bag. Not a purse, but a sports duffel, her gym bag. She'd always been more of a tomboy in her interests, despite being a very attractive girl, quite feminine in other aspects.

It was suddenly much more of an issue acknowledging my little sister's attractiveness. It had been background noise before. I knew about it, but didn't think about it.

"Sure." I said, "I can wait."

Claire flashed me a quick smile and headed for the bathroom.

Unprompted, my now constantly analyzing mind assured me of her body's measurements, leaving me little doubt what she’d look like without her clothes. C-cup, perky, natural. Pouty lips, well toned ass. A lot of squats at the gym. They were paying off.

I consciously didn't look. But I knew.

***

18:30 Wednesday

It was surprisingly easy to get someone to accept I'd just had a growth spurt, it turns out. No skepticism, no questions necessary.

While Claire helped me pick out clothes, we fell almost, but not quite into a familiar routine. I'd always been less fashion conscious than her, so this wasn't entirely new.

She teased me about some of my choices, approved of others, and suggested more. I drew the line at accessorizing. I'd never be the guy who cared all that much about a fancy watch.

But there was an awareness underneath it all. Her flushed face and dilated pupils. The way she wouldn't stop touching me, as though reassuring herself that I was there. I could have made her stop, but I didn't. I'm sure we looked more like a couple than brother and sister.

I did subtly push with my power in other things. By the time we returned to my place, I had about a week of button-ups and slacks, some casual clothes, a new blazer, and three sets of workout gear. Three new pairs of shoes. And roomier underwear. One of the changes to my body that I don't think I've mentioned. I grew... All over. You catch my drift.

A lot of it was purchased using the employee discounts of the clerks I spent some time talking to. The resistance I ran into was quite varied, from immediate agreement following the first suggestion, to requiring both touch and eye contact to push past the aversion of one particular rules stickler.

I dropped most of my purchases outside my bedroom door, and headed for the kitchen to help Claire unpack the groceries.

"So... Did you want to stay for dinner?" I ventured. Claire looked almost guilty, glancing over at me, her face flushed. I was intimately aware, because of my new senses, that she was dripping wet and had been for a while.

"If that's okay..?" My sister's voice sounded small, uncertain. She was usually so brash and confident. I didn't feel like just my apparently intoxicating presence explained all of it.

I tried not to think about what I was smelling, and gave her a reassuring smile. "Of course. You're always welcome, you know that. Chicken parm and a movie?"

Her face lit up, both happiness and relief. "Sounds great!"

"Alright, you go pick something out, I'll get the food started."

Just a little bit of distance, for at least a little while. My sister headed out into the living room, while I started prepping dinner. I actually enjoy cooking, when it's not just for myself.

Claire picked out an action movie. Superhero flick. The irony. I joined her on the couch once the chicken was in the oven and the pasta was boiling, and she immediately cuddled up to my side.

Not... Entirely out of bounds for our relationship, but unusual. So much for distance. A few minutes in, I decided to just ask. "Claire, are you going to tell me what's going on with you?"

She stiffened, curled up against my side, having draped one of my arms around her. After a second, she said quietly. "Me and Brad broke up. I - I don't really want to be hanging around at home. I haven’t found a new place yet. Crashed on Brianna’s couch yesterday."

"I'm sorry." I winced in sympathy, squeezing her a little tighter against my side. Dangers of moving in with a college boyfriend. Our folks lived two hours south, near the border with Mexico, not exactly ideal for her final semester in college. No wonder she couldn't skip out on work to sit at my bedside. "Do you want to talk about it?"

I was taken a bit off guard when she sobbed suddenly. "The bastard cheated on me. Some girl from his internship, it's -" She sniffled, burying her face in my side, "Fuck, he's such an asshole. Didn't even have the guts to tell me, found it on his fucking phone."

"What a fucking dumbass." I agreed readily.

"I feel... Fucking worthless. He just threw away two years, like that." Claire snapped her fingers, voice choked up with anger. "All fucking down the drain. It feels like I’ve wasted all that time and effort, you know?"

"You were always too good for him."

She was quiet for a few beats, except for the occasional sniffle.

"You really think so?" The anger was gone again, and she just sounded hurt and small. ****. God damn it.

"Yes." I let it be clear in my tone that I was rolling my eyes. "Brad was always average at best, just an asshole with a moderately rich dad. You are hot, smart and going places. You are awesome. He was fucking lucky to have you, and an idiot to throw that away."

"... Thanks, Jack." Claire said quietly. She traced her fingers over my t-shirt, across my abdomen absently. After a little while, she chuckled, poking me in the side teasingly. "You think I'm hot."

"And awesome," I deflected, tone only kept even by that protective blanket of calm over my mind.

A moment later my phone alarm for the pasta went off, and any further teasing was forestalled. Claire seemed almost **** to let me go, but finally paused the movie at the threat of burnt food.

It only took a few minutes, but when I came back she was if anything more flushed than before, not meeting my eyes. I’d heard a choked, muffled sound while I checked the oven, and figured she’d decided on a good cry. Instead, some tension had gone out of her, and the feeling I got had an undertone of satisfaction.

I was uncomfortably aware, as she snuggled back up to my side, that I could smell my sister's arousal on the fingers tracing lazy patterns over my stomach. We watched the movie in silence for a while.

This time it was Claire that broke it.

"You're pretty hot too, you know." She said quietly.

I was far into the danger zone at this point.

"I know." I deadpanned, making her snort in laughter against my side.

"Asshole."

"Very attractive asshole, thank you very much. Runs in the family."

That made her poke me in the side again.

"Are you dating anyone right now?"

I shook my head. Then reconsidered. "Well, I technically have a date on Friday."

She chuckled. "Love technical dates. Who's the lucky girl?"

I smirked slightly, "Doctor Jean Grey."

My little sister gaped up at me for a second, then started laughing. "You did NOT just fucking ask your doctor on a date. Did you? No, wait, the doctor I spoke to was named Blackwood."

"Pretty sure this was another doctor. Probably had a shift change before I woke up."

She feigned wiping away a tear theatrically. "Oh, that's just priceless. Can't believe you pulled it off."

"Told you. Very attractive." I chuckled, shrugging. In truth, whatever was happening to me, I could barely believe my own luck either. If it hadn’t been for how it happened, I’d be ecstatic.

"Shut up." Claire snorted, then prodded. "So, what's she like?"

One of the most powerful mind controllers in the world, apparently. Part of a secretive planet wide organization to monitor superpowered threats.

"She seems cool." Claire poked me in the side again, until I was **** to elaborate. "About my age. Very pretty. Green eyes, bright red hair."

Claire laughed again softly. "Thank god. Dr Blackwood was almost mom's age. Though that would have been even funnier."

We fell into a comfortable silence again, until my phone signaled dinner was ready. We ate in the kitchen, content to return to the movie later. It wasn't exactly a banger, anyway, but good mindless entertainment. The little table and chairs I’d fit in there was perfect for two, but could squeeze in a party of four if you didn’t mind getting cozy.

We talked about random things. Claire's work, mine. I stayed well clear of mentioning any project Mason was involved with. Some particularly amusing or annoying customers and clients. Her friend and co-worker Brianna’s antics at work. She’s a bit of a flirt.

We'd reached a comfortable lull when the question I'd suspected might be coming finally came up.

"Could I move in here for a while?" Claire asked nervously. "It's - I can't fucking live with that asshole, he keeps pleading that it was just a one-time thing, trying to minimize it and make it my fault somehow. Get me to take him back. It's driving me up the wall."

I let her vent. I already knew what I'd say, dumb as it might be.

"- and he's the only one on the lease, anyway. Wouldn't put it past him to fucking kick me out without warning as some sort of punishment for finding out."

Claire shifted gears, her voice quieter. "I'd - I'd stay out of your way. I promise. I know it's not great timing, but I can help with rent, too."

Giving me the puppy-dog eyes, honed through years of getting dad to agree to anything his little princess wanted. Her wants were generally pretty reasonable, to be fair.

I shook my head, chuckling despite myself.

"Of course you can stay, dummy. I'll help you get your stuff tomorrow."

She stood up and stepped around the table to hug me, looking a little teary-eyed. "Thank you."

At this angle, my sister was basically forcing my head into her moderate cleavage, so I just patted her on the back awkwardly and tried to extricate myself.

"You can thank me later. Just --- make yourself useful around the apartment, and I'll be taking you up on the rent."

"O-okay." She kissed the top of my head, before finally releasing me from that disturbingly pleasant headlock. "I will."

I'd been walking around with a permanent half-chub all day because of my new awareness. This certainly wasn't going to help.

We finished the movie without much more of consequence happening. Small talk, planning Claire's moving in tomorrow. I got some bedclothes out and helped her set up the couch, with Claire pouting and joking about how we could've just shared my bed.

Half-joking, I suspected, but she accepted it easily enough when I deflected.

I thought I had everything under control, I really did.

***

Thursday 9th of June

00:10 Thursday

I had a very nice dream about Jean. And Natasha, the spy. Several of my work colleagues. Then, suddenly, I realized I was no longer dreaming. I awoke with a pleasured grunt, and wondered how the hell I hadn’t woken earlier.

The room was still darkened, the time slightly past midnight.

Every one of my enhanced senses told me that there was only one other person in my apartment. The one currently swallowing my cum desperately, mewling in pleasure and cumming her brains out while she milked my cock with both hands.

Gooooood, that felt good. It was incredibly wrong. Intellectually.

Physically it felt extremely right.

I felt that connection, which had already grown stronger the more time we spent together, and was further enhanced by touch, by the almost worshipful way she stared up into my eyes.

It suddenly expanded ludicrously, as my sister swallowed down the last of my seed. It was powerful before. Powerful enough to turn a government mind controller to my protection, even if I suspected from her behavior that Jean might have already been sympathetic. Now? I wasn't sure there was anything I couldn't do to Claire.

"What, exactly, do you think you're doing?" As controlled as I’d become, my voice didn’t sound like the admonishment I’d intended. It came out thrumming with my own arousal.

Claire pulled her lips off my cock with an audible pop, looking almost drunk on pleasure, panting softly.

"Making myself useful, Jack." I could make out the mischievous smirk on her face, but even if I hadn't been able to see unnaturally well in the dark, it was audible. "Thanking you properly. God, your cum tastes so fucking good. Your cock too. I've been wanting to do that all day. I've never fucking cum that hard before."

"This --- This wasn't what I meant." I grunted.

My little sister was still tugging on my length, planting kisses on my cock, and while I'd had the self control not to initiate anything - lord knows I didn't want to stop it.

"I know." She gave my member another sloppy kiss. "You're a good brother." Kiss. Lick. "You wouldn't take advantage of me like this. Mmmh. But I want you to."

She moved down to suck my balls while she kept working my shaft, before coming up for breath again.

"I couldn't sleep, you see. I was too fucking horny thinking about your huge cock being right here, just a room away. It's obvious, even in those sweatpants, you know. And it was already hard for me, too, when I came to check on it." She smiled playfully, radiating utter contentment. "You were moaning a little, like you were having a wet dream, and needed some relief. So what's a little sister to do? I know what boys want when their cocks are hard. I had to make myself useful, didn't I?"

Any objections I might have had felt very distant, with her already between my legs. So instead I said, "This is not how you're paying rent."

"Mmh, of course not. I might be a slut for this delicious fucking cock, but I'm not a whore, Jack." Claire chuckled softly, letting one hand trail down her tight body from my shaft to between her thighs, mewling against my cockhead as she started working her clit.

"We can't -" I panted softly, trying to think and not think at the same time. This was so fucked up. And it felt so fucking good. "We can't let anyone know about this. Alright?"

"Mhm." She enveloped my cock again, her muffled moaning sending tingles up my spine.

"Only when we're alone in the apartment, or when I initiate."

Claire came up for air, licking her lips sensuously. "Yeah, I'll be a good girl."

That hit something primal in my brain, something possessive and uncaring for the consequences.

"You'll be my good girl." I growled out, unthinking, the incessant analysis in my head for once completely quiet, drowned out by that lizardbrain need that was thrumming in my head. "My obedient little sister slut."

"Oh, fuck, yes -" Claire's eyes fluttered closed and her body shook, moaning. She pressed the length of my cock against her face and kissed it with sloppy passion as the words seemed to trigger another orgasm.

When it passed, she mewled as she continued licking me. "I'm so fucking wet for you, big brother. Please don't make me wait anymore. I need to feel you inside of me."

Instincts I didn't know I had roared their approval. I was moving before I had any chance to think about it, pulling her up to me by the hair and kissing her possessively. Our lips crashed together, and I could taste myself on her tongue. I didn’t care in the slightest.

Claire mewled in pleasure, responding in kind, her smaller body squirming against me until my hand on her breast made her pull back with a gasp, her back arching, shuddering.

"I love you -" She keened, quiet but more sincere than anything she'd said since I woke up. It was the first thing that really made me pause, the tiniest of hurdles for my own lust-addled mind.

Taking a deep breath, I cradled her face and kissed her more tenderly.

"I love you, too. Are you sure you want this?"

Claire nodded immediately, face flushed and wanton but recognizing how serious I was, she whispered huskily. "I've never wanted anything more. I'm - I'm on the pill. Please."

She’d never looked more beautiful.

My worries soothed, I rolled us over, pinning her beneath me. Claire hissed in approval, staring up at me with shameless need. "Take me."

Again, the roar of approval through my body. I pulled her legs up towards her shoulders, and my sister caught on quickly, grabbing onto her smooth legs and holding herself open for me.

I pressed my drooling cockhead against her entrance, with the overwhelming desire to utterly ruin her pounding in my brain. But I held back, at least for a moment.

"I'll go slowly."

"Fuuuuuck - stop teasing me -" Claire panted, rolling her hips and squirming, trying to get me inside.

I gripped her hips and held her in place easily. "A good girl would let me fuck her however I wanted to, Claire."

"I'll be such a good girl," She breathed in a moan, stopping her struggling with visible effort, but didn't stop pleading under her breath. "I promise. I'll give you my ass, anytime you want. I'll suck your cock all day. Just - please - fuck me, big brother -"

Almost involuntarily, my hips twitched forwards.

I grunted in pleasure as I pushed past her puffy vulva, my cockhead popping past the slight resistance to claim her dripping cunt, slowly - so slowly. Claire arched her back off the bed in a silent scream, her entire body twitching.

Even with how wet she was, my sister's pussy gripped me like a vice, and only through slowly grinding her hips did her hot, velvety inner walls slowly surrender to my cock, undulating around my length, milking me exquisitely.

My sister moaned and shuddered continuously beneath me, biting her lip almost hard enough to draw blood. By the time the wide head of my cock pressed up against the entrance of her womb, there was still four inches or more of my manhood left outside of her.

We were both panting as I leaned down and kissed her hungrily. Claire responded weakly, but with enthusiasm. "I - I think you broke my fucking brain." She grunted as another minor orgasm rolled through her body, her pussy rhythmically milking my cock as she rolled her hips luxuriously. "Fuuuuuck, that's so good. You're stretching me out. Fucking molding my insides around your cock."

It may have been my imagination, but it looked like her tight, flat stomach actually bulged outward slightly.

"I'm going to fuck you now." I grunted, the din of satisfaction and domination in my head a constant background noise.

"Yeeeeeeeesssssss! - f-fucking use me - use y-your sister slut -"

I pulled slowly out of the undulating grasp of Claire's cunt. It was like her body never wanted to let me go. Then grunted in satisfaction as I shoved back inside of her, as quickly as I thought she could handle.

As I sped up, the noises my sister made became beyond obscene, but any time I slowed down, she begged me needily to continue. Eventually she had to grab a pillow to muffle her screams of pleasure.

My hands roamed her ass and breasts as I pumped into her. Even a brush against her clit, or flick of a nipple, would set her off again and again. Soon she couldn't even hold one leg up, going practically limp aside from shuddering occasionally in orgasm.

"You okay?" I asked, holding still inside of her as I lifted the pillow clutched against her face.

"In fucking heaven -" She gasped, a sweaty mess, near delirious. "Never stop - f-fuck - never stop fucking me -"

She whined in needy loss when I pulled out of her, but hissed out her approval when I smoothly flipped her over and maneuvered her to her knees.

"I love you. Fuck, I love your huge cock." My little sister moaned deliriously, her face planted against a pillow and her pussy up in the air, winking at me. "Oooooh Gooooood -"

Claire's tight, exhausted body twitched in pleasure as I took her from behind. She buried her face in the pillow again, but occasionally I would pull back on her ponytail, just to hear her keen in pleasure as I pounded into her.

She could take more of my cock from this angle, but far from all of it, so I smacked her tight bubble butt for lack of being able to hear my pelvis clapping against it. Each time I did, her pussy spasmed gratefully around my cock and her back arched in pleasure, as though pleading for more.

Finally, I bottomed out against her womb's entrance again, my balls churning as I pumped my sister's pussy full of cum for the first time.

Claire's back arched up and she screamed silently at the ceiling as she clutched her right breast, tears streaming down her face as her whole body convulsed.

Her pussy squirted out her juices against my pelvis, clamping around my manhood in time with each torrent of cum filling her up. It lasted almost a minute, though she collapsed into the pillows again well before that, moaning hoarsely, practically delirious.

"This is where you belong." I grunted in her ear possessively. It just slipped out. Felt so incredibly right. "Impaled on my cock, being pumped full of my cum. You're mine."

"Yeeeeeeesssssss -" My little sister hissed in agreement, her eyes bleary with exhaustion and pleasure. "Yours. F-fuck."

I rolled us over onto our sides, away from the significant wet spot beneath where I'd been fucking her, and pulled her body tightly against mine. Claire shakily took my hand, and pulled it between her breasts.

"Mmh, thank you.” She moaned softly, “Best big brother a needy little slut could ask for."

She was still half-impaled on my only marginally softer cock.

I chuckled quietly, kissing her neck.

Part of my mind knew, of course, how much this would change things. But I didn't care at that moment.

I felt so intensely satisfied.

I could leave any problems for tomorrow.

***

A/N: Any feedback appreciated.