Your sister came early

Carefully disentangling yourself from your napping girlfriend, you gently lay a throw blanket over Ashyln's delicate frame.

Then, not bothering to redress yourself, you tiptoe to the door and answer it.

Cassidy's on the other side, smiling big. She wears a tight flowerprint shirt and a pair of white leggings.

"Carrie!" she says, giving an infectious smile before she rushes forward and scoops you in a fierce, loving hug. She doesn't care that you're naked, that your bare breasts press between hers against her soft shirt.

You hug her back quickly, with all your strength, but let her know to keep it down. "Shh. Ash is here. She's asleep," you say.

Cassidy looks over your shoulder and sees the buzzcut blonde girl under the blankets on the bed. "Ooh. Sorry," she whispers.

"Let's talk outside," you say, pushing her back out into the hall and closing your front door behind you. You have no need to check the handle - it only has a deadbolt, so there's no way to lock yourself out.

You shiver briefly at the slightly cooler air of the hallway. You don't always keep your AC on, to save on energy bills, and you haven't been as daring with exposing yourself like this since you and Ashlyn started dating.

Cassidy bites her lip and looks you over. "You're so tan."

You hold your arms up and do a slow turn for her. "I've been listening to audiobooks on my bike rides," you say. "Not to brag, but I feel like I'm in better shape than I've ever been."

Cassidy lets her fingertips lightly run over your waist and hips as you turn for her. "No doubt. I can totally feel how toned you're getting. Maybe I need to try that, or get Dave to. Now I'm betting he'd be really into audiobooks."

Finishing showing off, you put one hand on Cassidy's ass, one on her breast, and then pull her into you in a kiss. "I missed you," you say, sampling her lips and probing her mouth with your tongue. Your tongue makes contact with hers. Velvet, wet, and hot. Mmm.

"Mmph," Cassidy groans, taking the tips of your breasts in her hands and squeezing with just the right amount of pressure.

An involuntary moan escapes your throat.

"I missed your nipples, Carrie. So plump," compliments your sister.

"Thank you," you say, basking happily in her attention. Cassidy continues feeling you up in the hallway, hands growing bolder and bolder.

Ashlyn is a wonderful lover, and girlfriend, but you always wind up so worked up after your trysts. Luckily you have the best sister in the world to take care of you, and her boyfriend, when necessary.

Soon, your little sister's got you pinned to the wall. She sucks on your boobs, one at a time, and pumps your wet snatch with two knowing fingers.

_Nobody _knows your body like your little sister. Not even Ashlyn.

She replaces her mouth with her hand, and gropes you while fingering you. "You need this," she observes, her voice hot in your ear.

You nod vehemently. "God yes," you say, riding her fingers and gripping her nice plush butt. "Fuck."

"What's your clueless enby girlfriend even doing for you?" asks Cassidy, in jest.

"I love her," you mutter, seizing up as Cassidy starts hitting your sweet spots. "Yes. That's the stuff. Ohh yes."

"You love _this," _Cassidy corrects you, with a tight giggle. She picks up the pace, running mad circles on your clit with her thumb as she fingers you. "You love getting what you want."

You can barely think. Lightning is racing from your pussy to your head and back down again, zinging from your breasts to your butt all the way down to your toes. You're alive. So amazingly, incredibly alive.

"Please. Oh Cass. Please, keep... keep going," you moan.

"I know exactly how you feel," Cassidy breathes in your ear, keeping you in place with deceptive strength for a girl her size. "I'm tighter now. Faster. Like a sports car. You're like a luxury sedan. Anywhere I want to take you, it's a great ride."

You can do nothing but nod. She rewards you with more touches. More circles. And then you're coming. Hard. Good. It's been a while - it's not the same when you do it, or when you sleep with Nick. Cassidy's the only one.

"Get dressed, sugar tits," Cass teases, giving your tired body one last good squeeze. "I came over here to catch up with you, not fuck you. Unless... that's what you wanted, of course." She throws this in with a wink.

You share another kiss, and then you excuse yourself to fall back into your apartment.

--

You and Cassidy sit over table at a little health bistro just a block away your apartment complex. It's not the kind of place to go when you're starving, but it is the kind of place you go when you want a nice seat on the sidewalk while you catch up with your sister. Good ambiance, swift and unobtrusive service. The food's on the pricey side, but it knows what it is and it hits the spot.

You sit across from Cassidy, wearing a black tank top dress and a pair of purple-laced black sneakers. She leans across her elbows and animatedly fills you in on her love life.

"I think he's going to propose soon," she says, dreamily.

"Dave's finally getting into gear, huh?" you say back, grinning and leaning back. "We dated for about this long, I guess... maybe if I'd dated him a bit longer he'd have asked me to marry him."

Cassidy swats playfully at you. "Do not. He's my boy now," she says. "Well. Except when you want him, of course. I suppose it's only right since you're the one who introduced us in the first place."

You laugh. "I don't know if I'll ever forgive him for stealing you when it turned out he couldn't have me," you say, preening under your little sister's attention.

"You could always steal him back. If that's what you want, Carrie," says Cassidy, nothing but utter devotion in her eyes when she looks at you. She reaches across the table for your hand.

You accept it with yours, squeezing. "It's tempting. But Ashlyn loves me. I want to see where this goes. She's changed me so much, Cassidy. You don't even know."

"Oh, I know all right. Love changes you when you've got a body like that," says your little sister, pointing straight at your heart. "It's dangerous. That's all I'll say."

You smirk and take a sip of your ice water. "Really? That didn't stop you from saying you were better than my girlfriend in the hallway."

"Do you want me to say more?" goaded Cassidy.

You knew she'd say a lot more if I asked. Everything was just a word away with your little sister. You humored her. "Yes, I do," you tell her, feeling adventurous after doing it in the hallway where anybody could've walked in on you. "Tell me. What else do you want to say about my girlfriend?"

Cassidy takes a deep breath. Dangerousness shows in her eyes, and on her chest - no bra, obviously. You suggested she go without them. Risking everything always turns her on.

"Ashlyn is a good girl. She's a nice girl. And she's confused," your sister tells you. "You're not getting what you need. She can't give it to you. But you can help her. Fix her. You still have the helmet, right? Course you do, when we head up for the family cabin trip, you said you'd bring it. So you can do anything you want with your girlfriend, and she'll love it. Or hate it. Or think nothing of it. Whatever you want."

"Ashlyn isn't you," you say, stroking the back of Cassidy's hand with your thumb. "I don't want her to be you."

Cassidy just smiles, knowingly. "Maybe you'll change your mind later. Maybe _you'll _want to be her. I won't judge," she says. "At the very least, get the helmet on her. Just see where it takes you. It's not like you have to replace Ashlyn - you can look in her file, right? If she really loves you so much, she'll let you talk her into it. Tell her it'll make you happy. Tell her it'll help you make _her _happy. Whatever it takes. You're a smart gal."

The conversation steered back to mundane things after that. Cassidy's engagement fantasies, Mom's annoying intrusions into our lives, injecting words of advice or criticism when you didn't ask for them, your respective college nightmare courses.

But, after you'd kissed goodbye and Cassidy went off to meet with her boytoy (your sugar daddy), you couldn't shake her words about Ashlyn.

You came to your apartment, and let yourself inside.

Ashlyn was still asleep, breathing peacefully, head nestled into your pillow.

Maybe it was time you showed her your pet project, one way or another...