Incest Seduction/Try to help Dawn, a kiss is no big deal
You glance between Dawn and the camera lens over and over. Why is this tempting? It's already been a weird morning but your state of mind does not have you thinking like your normal self. You take a deep breath and focus on what Dawn said: It's just for fun. And she's right, kissing is just plain fun. Admittedly you have more secondhand accounts on that than firsthand, but still...
Honestly, this is just the sisterly thing to do. She would help you out if you needed her. Probably.
"Umm... Yeah. Like, whatever." You shrug with all the indifference you can muster and look away with what you hope to portray as boredom, but staring down at the floor red-faced probably comes off as embarrassment, especially since that's all you can feel.
"See? I told you she's down, all the time! Just give us a sec."
Dawn steps to the side, dragging you along. She takes a moment to carefully prop up her phone on a shelf behind the sink then positions herself opposite you, repositioning you several times until you're both dead center in the frame for your audience.
"You've done this before, right?" Dawn whispers to you, displaying a glint of concern.
You give an unconvincing head bob. "Yeah. Sorta." Seems that's good enough as Dawn just smiles.
"She's so shy and cute!"
"I think Kim normally gets dinner before sex."
Wait... sex?
Dawn locks her lips to yours before you can even process that comment. Her hands unlock yours and guides you into a tight embrace. Your big sis kisses you ferociously, like she has something to prove (which she might) but you're practically inanimate by comparison. You try your best to match her fervor with your limited experience. Mashing lips in the nude like this is so exhilarating, even though you know it's so very wrong that it's with Dawn. Of course you haven't had that problem thinking about Zack. Conversely, Dawn hardly seems affected by kissing you; her hands have no qualms about exploring your trim unclothed frame.
You're glad your sister is still taller than you. With your head tilted back you close your eyes and imagine someone else groping and kissing you. Thinking about a boy should make this easier. First that new kid that just transferred to your grade. Then it's the guy who kissed you at summer camp. Then daddy pops into your head. That shocks you and briefly makes it feel like he caught you in here. You try to swap him out for your brother, but you can't shake daddy, his long shiny cock pointing out in front of him...
Your sister's hand plants itself at the back of your head. She manipulates your hair tie for a few seconds then rips it away, freeing your ponytail in what must be a dramatic display. The passionate release, your hair falling forward onto your shoulders, all brings you to open your eyes in surprise. Dawn stares straight into you, a hungry gaze capturing your attention, a sultry smile on her face. Then lightning courses through your body. You hop onto your tiptoes and paw at your sister's chest, her orbs feel so good in your hands, or maybe that's just the feeling coming from your groin.
Dawn's fingers have just found your clit, and they didn't even introduce themselves first. She is rubbing your virgin sex like she owns it, like she just paid top dollar for it and is desperate to get her money's worth. You can't help but moan under your sister's brazen and beguiling touch. It sounds pathetic and needy, as if you've been begging all morning for this. In some ways you have been, but just not advertising it. Now you can't stop it. You moan again and again, a fire roaring inside you. You quickly lose yourself in your arousal, the pleasure as sudden as it is welcome. There are more gross comments from her phone, but you hardly care. If anything the cheers are helping you get into it. The embarrassment, the exhibitionism, the taboo, the passion...
Something snaps. It's like a dam breaking. Whatever you were trying to hold back comes rushing out in a flurry of activity. Your hands grab the sides of Dawn's face and you pull her onto you harder so you can thrust your tongue into her mouth. Your pelvis starts rolling and legs twitching to encourage Dawn's speedy digits. She then gently pinches your nipple out of nowhere forcing a crazed squawk from your throat. But you reciprocate by putting your hand under her shirt and to palm her far more sizeable breasts. Her nipple is poking in your palm as you squish her boob.
That's when it goes even further. Dawn sneaks two of her digits up into your pussy. A wild little squeal comes out of you and you actually push your sister away out of shock and, frankly, fear. It's scary to think about what this all means let alone how good it feels. But Dawn doesn't go anywhere and you don't really want her to. She has you hooked now, literally and figuratively, and is already feeling her way deeper inside you. This is so crazy, but it's crazy good. Your hands are still on Dawn's tits and it only takes a moment for the scary to subside before you return to circling and squeezing. To get even, you try to pull down her straps to uncover her boobs. If she has full access to your tits then you want the same access to hers. It's only fair.
Dawn throws her hands up to stop her shirt from going down. Before you could try again, Dawn closes the distance between you. She plants a hand on your lower back, stabilizing you before she starts thrusting her way in and out of your tight little slit. You gasp, again and again, which then turns into a moan controlled by the rhythm of her fingers. Some small part of you keeps chanting 'no', the part that knows better, but the crazed chemical soup of hormones and endorphins flooding your small body do not seem to agree.
Wanting to play your part, and perhaps even the score, you again try to pull her shirt down. But she twists away and slams her fingers up your snatch, making you gasp again. There are hoots on coming from the phone which give you strength. This time you work your fingers down the front of your sister's pants. She definitely wasn't expecting that, as she is a little late in pulling her hips away. But she does, in the end, and your hand slips out.
You can't understand why she's trying to stop you. You go for it again. This time you don't even get to her pants before she ducks you. Now you're frustrated, especially since she's still manipulating your tight innocent hole through all of this. That's definitely not fair. You lash out and clamp onto the waistband of her PJs. With a firm hold, you pull her close as well as stretch her pants away from her body. Staring with a determined expression, you dip into her pants again and finally touch your big sister's vagina.
You both pause, briefly uncertain of your exchange of one-upmanship. Touching another girl's privates is so weird, surreal even. Touching your sister there is really weird. Your palm rests on her pubes while your fingers press firmly against her puffy vulva and you can feel her slick wet arousal trickle out of her. That's nothing when you consider Dawn is knuckle deep inside you, but it's still a lot to process. You're pretty sure you're not a lesbian. You haven't really fantasized about it. There was one truth or dare at a sleepover a few years ago that got you feeling funny, but nothing else you can recall. Then again, sex is sex, right? Should gender matter? Dawn sure isn't bothered. Well, about doing you at least. Seems she wasn't prepared to be 'done' herself.
When you move your fingers, Dawn again pulls back, but this time she mouths no, twisting sideways a bit so the phone won't see. Her finger slips out of you, and you understand. She's fine with you naked and being masturbated in front of her friends, but she won't be.
The unfairness flashes through your mind, as well as the need to touch your sister. But her finger's still outside your own pussy, and you need that one back up there. This had started with you helping her, but now you need to finish. You pull your hand out of her pants.
Only a few measly seconds have passed since you had stopped. Now Dawn pulls you closer again and crashes her lips into yours. Her fingers again make their journey upward, pushing into your wet vagina and making you thankful you didn't push the issue. There are hoots coming from the phone as you break off from your sister's lips and turn your head upward to gasp. You are getting closer, and Dawn's friends can hear it.
Suddenly Dawn pulls away again. You moan, just as her friends groan from her phone.
"Hey, don't stop. She was so close!"
"Yeah c'mon, she's begging for it."
"You gotta finish her Dawn!"
"Oh, I'm finishing her." Dawn says. "Just a change of scenery"
Next thing you know, Dawn is hugging you and lifts you a short distance to plop your butt onto the counter beside the sink.
"Lean back. And hold this," she adds, passing you her phone. "Make sure everyone can see."
You fumble through different angles while Dawn spreads your legs and crouches down between them. You get a short downward shot from your belly button then lift the phone high above you for a body shot. Uncertain of all this, you settle on holding it off to one side just as your sissy penetrates you for the second time and promptly finger bangs you faster and harder than before.
It's those two familiar fingers again, but this time the rest of her hand smacks your pussy at the end of every speedy insertion. Dawn adds some random kisses and dainty licks of your clit into the mix, the light oral work mindblowing in concept alone. You have no idea if you're holding the camera straight now, and none of it matters. You wait with hungry anticipation for every soft, fleeting touch of your clit. It can't even be 30 seconds later when you grab a fistful of your sister's hair.
"Ohmy- GAWD! It... It's... AAHHH!!!"
You scream your orgasm joyfully, long enough to offer release but it's cut short when you remind yourself where you are. Dawn keeps thrusting after your silence though, as if she wants more from you, her focus and persistence causing your body to shudder. She induces these body spasms for a solid 10 or 15 silent seconds before easing up and letting you breath.
"Shit that's lit."
"They're both freaky!"
"Jealous!"
"I'm fucking pregnant, oh my god."
Dawn steals her phone back and flashes the camera inches away from your freshly finger fucked slit. You can only imagine what that looks like up close, sopping wet, bright pink, hopefully not a gaping mess. Sweaty, panting, naked and exhausted is one thing, but this close up feels somewhat humiliating. You're about to throw your hand down to block everyone's very detailed view of your inflamed pussy mound but Dawn puts her hand back there.
She again puts in two fingers, making you gasp, and saws them in and out twice, twisting them. "There. Proof SHE is satisfied. Are you all as happy as she is?" She asks as she pulls her fingers out. Then she puts those fingers on your lips, "Show them you're happy sweetie."
You don't even have to think about what she wants you to do. It's like instinct, or the subtle pressure your sister is putting on your mouth. Your lips part, and Dawn pushes her fingers inside. Without being asked to, you begin sucking them, licking them every once in a while.
Cheers and congratulations come from the phone, with comments like "what a tight puss", and "why can't I have a sister like that?" Dawn
Dawn's fingers leave your mouth, and she asks you to smile for the camera once more, but otherwise seems done with you. You are now coming down from your high, your heaving chest slowing down. Dawn also seems done. She leaves her chat and looks at you with a sincere grin.
"Thanks," is all she says to you, touching your knee before leaving you there on the counter.