Tough Love

In the end, I want her to be mine... and I want her to be happy being mine. “Look, I won’t make you suck me off if you don’t want to, but you are here. So why are you here?”

“I just needed to come here and... fuck...”

“Fuck?”

“No, not to fuck, I'm just... frustrated...”

“Maybe it was because I make you come when no one else can?” Her awareness being on for this makes this a dangerous path to wander down, but I have to try something.

“You know that's not true... at least, not until... lately. Maybe that’s just because I’m...” She half-laughs, half-sobs as she runs her fingers through her hair. “Maybe I really am fucked up, wanting you to...”

“It's alright. I like it too.”

She rolls her eyes at that. “No shit you like it, you little troll.” I can't help but join her in a sudden fit of laughter that takes us both. The situation is crazy for both of us, even if for different reasons. For a brief moment there, we're just brother and sister again, laughing at some stupid misunderstanding or fact of sibling life... but the laughs die down as she shakes her head and barely whispers, “Maybe we're both fucked up.”

“No one else has to know that.” I stand slowly to not frighten her off, and for once she seems unworried about my erection or my approach. Maybe it’s stupid teenage logic, maybe I just want an excuse, but as I take the three steps to get to her I still have that hope that I could pleasure her past all the shame or guilt she's feeling right now. I embrace her and kiss her on the clavicle as she turns to involuntarily smell my hair. That first dose relaxes her body noticeably in my embrace. A shot of courage, then, for what's coming.

Our crotches and chests press together as I tighten the hug until, confident that she's snorted up enough of me to get tipsy, I grip her hair in my left hand. “No-!” becomes a whimper and a shiver as I tug, sending jolts into her body as my other hand drifts to rub her firm ass. Soon we’re backed up and into my ajar bedroom door, slamming it shut as I pin her against it with my body. I angle her head and kiss her deeply, feeding my own desire on the half-baked theory that it would cure her misery. If I made her come enough times, maybe it would work.

That drives me ever forward as I continue to fill her senses with me, tugging at her hair with **** that could never feel good except for a Custom Girl like Alice. No strand dislodged, no pain felt, she’s left moaning and moistening my cock as it hotdogs into her cleft. My knees tuck inward to then pull her knees apart and **** her legs open. My dick continues to stimulate her as I grind and tug and kiss at my dear Alice, and it doesn't take long before she's moaning and building towards the first of my therapeutic orgasms.

I’m being a horny idiot. I know that, somewhere in the elevated sentience that lets me be a member of society... but I can’t undo the customizations or make her forget, so this will have to do. She mumbles some warning into my mouth as I continue to feed her my tongue, probably about how she’s going to come. That warning turns into a strangled moan, but she can’t hide it while our mouths are joined; I feel the hot gasp on my tongue, the squeezing of her thighs on mine, and a simultaneous, brutal pull on her beautiful locks reward me with a rush of her vaginal lubrication.

At some point I let her off the door, but only to carry her, one hand on her ass and the other pulling her hair, as I grapple her through the twitching of her first orgasm of the afternoon. I lay her down on the bed... and instincts from my time with Ms. Lia, or just my rapacious appetites finally being fed, or some other complex or animal desire finally overrides the one little line I had set for myself to not cross today.

“Dave... no, Dave, you're... you're inside...!”

I am inside her... and I want to tell you it was an accident, but as I part her thighs and drive myself into my lesbian sister to the hilt of me, I know it's too right to not finish. Her still-coming pocket grips every incestuous inch of my shaft as I kiss her womb with a dab of pre-cum--thank the Devil she's already immune to pregnancies--and it's only because of the tears dancing in her eyes that I finally find enough of myself to pull out of her. I grope her breasts as I keep her there on the edge of the bed, her legs propped against my shoulders, while I rise and guide my cock to enjoy another investment I made.

“Dave, we... if we... ah, that's my-! Hhhuuuhng!” Her words melt to gibberish as I pry open her sphincter, thrusting into her colon until my balls tap against her tailbone. I lower myself against her as I do so, folding her body and reaching my hands to the nodes that matter: the violent, anchoring tug of her hair and a merciless, rapid series of flicks to her soaked clitoris. My hand snakes up her back and finds those locks, pulling on her hair with every thrust as I **** myself in and out of her ass with naught but the generous lube of her newly coming pussy. That cleft was now squirting a generous dollop of her own lubrication up and arcing briefly until it splattered on her own tits as I continued to sodomize my only sibling. Her gibbering complaints are gone now, replaced solely with moans and, unless I imagined it, a softly whispered, “Yes...”

I'm only encouraged by this "proof" that following my horny whims was good medicine. The bed creaks as I mount the edge and my sister, folding her further still.
I give up on her clit and focus on her hair, grabbing generous grips of it on either side of her face before tugging them towards me. What should be brutal and uncompromising pain turns into her third, squirting orgasm as she continues to fill the air, and cover herself, in her own cum. My bed is no longer spared as the puddles of her fem-jizz leak over her and into the sheets, but I'm long past caring; my sister's a moaning, throaty mess, drooling from either corner of her mouth as her eyes roll helplessly in her head while it gets tugged slightly more to the left or to the right depending on how much strength I have left to pull on it.

When I finally come, it actually surprises me. I fill her ass with all the jizz worked up over a relatively celibate day, enjoying her little gasps as my pulsing cock stimulates her already-ramped-up asshole. I jerk at her hair with every pulse and, by the end of my orgasm, I've teased a fourth out of my trembling, gasping sister.

When at last our moods cool and the pleasure fades, I softly pull myself from her brutalized rectum... and kiss her softly. I let her body unfold beneath me before mounting her again, this time to lay half on the bed, half pressed against her as she reciprocates my attempt at soft petting and making out after the fact.

She doesn't fight me... but she still cries and whimpers, even as she jerks my softening cock, even as she continues to tease her own clit. I join my hand over hers and continue our therapy until she's too drunk on my scent and I'm too tired to go on.

We don't take longer than the two hours it takes mom to get home...