Incest Seduction/Antagonize Dawn to get her to finger you
You'd much rather your sister give you an orgasm than for her to poke and prod at you like she was a med student, even if you might make her mad.
You wait for daddy to share something while pulling on his pants before you whisper again. "You fucking like this."
"You like it more." Dawn leans in and spits at your pussy, practically drools onto it. "Oh look. I made you wet."
"Oh yeah? Finger me more, attention whore." You're mocking her, and yet she does actually speed up.
"Projecting much? Whose being a whore for attention? Or you jealous how many views your puss is going to get me?"
"I bet those were just for you, so you can stare at daddy's semen while you touch yourself later."
She smirks and turns her fingers up to hit your g-spot. "If that gets you off then keep talking to yourself, otherwise I'll be stuck slapping your twat all day."
"Y-you'd love to finger me all day. This is probably the most action you've gotten ever."
"Says the eighth grade cock sleeve."
"Yeah? I bet you're jealous my pussy will get more likes than yours."
Dawn's knuckles slam against your lips, cum spreading further down her hand. "Cock sleeve says what?"
"B-bitch."
"Fuckin' slut."
"Dawn!" Mom interjects again after your words get more heated. "Could you try to put your tongue to better use, please?"
You nearly tell mom to shut up when Dawn's fingers slow. It was just getting good and she had to ruin it.
"What, now you want me to eat her out too?"
Mom raises an eyebrow and nurses her coffee. "Just a suggestion."
Small talk resumes and Dawn shifts her attention. "Yeah, like I'm... oh my god, you want me to, don't you?"
The look of frustration on your face says it all. You've never had oral before and you're horny as all hell. The idea gives you goosebumps. Of course you're going to deny it. "From you? Hell no."
"Bullshit! You totally want me to muff dive your snatch. I bet you edged just from me spitting on you."
"No! Edge of disgust maybe."
Dawn is all smiles while she lowers her head. "You want this. Sooo badly. And somehow I'm the lesbian?"
Your sister places her tongue atop the hood of your clit, only looking to egg you on further, then recoils when she tastes dad's spunk. She spits the taste back out onto your pussy then uses her other fingers to try to wipe the sheen off of your clit, all so that she can go through with her original plan; to torment you by teasing you. She plants the tip of her tongue against your hood again and glares up at you along the length of your stretched upper body. She doesn't move her tongue, just rests the tip at the top of your slit, drooling onto you at best.
"This is what oral is, right?" teases Dawn a few seconds later, touching her tongue to you between her verbal jabs while she fingers you. "I guess you middle school girls wouldn't know... Even most high school boys won't eat pussy... But I bet you're great at sucking cock already... That explains your grades... Explains your ponytail too..."
She's getting personal. Wanting to get back at her, and having the perfect opportunity, you extend your feet behind Dawn, cross your legs against her back, and pull her against you as hard as you can, clamping your thighs around her head once her face is smushed against your pussy.
You only keep her trapped for a few seconds but manage to jerk your pelvis and grind your sloppy sex against her features while you have her. You hear mom shout at you but you don't really care. You release a ton of frustration just from this one bit of defiance, perhaps the only true bit of control you've felt all morning. When she wriggles out a moment later there's a look of horror on her cum streaked face. You just flash her a sassy grin and open your legs again, beckoning her to get back to business.
The open palmed slap against your wet pussy is one that takes you by surprise, even though you watched Dawn's hand come down onto you in slow motion. Your pussy clenches and your legs shake from the impact. Your thighs clamp together and your back curls as you pull against your wrists, both legs shooting into the air. Your body twists to one side and your legs land together up on one corner of the table, knocking a dish and some cutlery onto the floor. You try to curl up into the fetal position, only to find yourself moaning with a spine tingling shiver once you let go of your gasped breath.
"Stupid little slut..."
Dawn grabs your ankles and stretches you out again, pulling you back to the edge of the table before forcing your legs apart. You tremble when she places her hand on you again, but this time she does so soothingly. She rubs her fingers around and through your lips, covering your whole crotch with daddy's thinning cum as if it were a calming salve.
"S-sorr-ry," you choke out.
"No you're not." Dawn pulls her chair closer and fingers you hard, her hand all but punching your pussy, making you yelp.
"Ahhh!" You wonder if she'll hit you again. You're almost hoping, just so you can see if it feels better or worse the second time.
"Stop playing. You love it."
"Hnggh... you... bitch."
"What, you want it harder? Want another slap?"
"No..."
"I don't even believe you." Dawn leans down and starts tonguing your clit in earnest, polishing your pearl with her spit. Watching your own sister eat you out with shiny streaks of cum smeared across her face really gets you wet. Knowing it's daddy's cum makes it hotter. Although she's doing all the work, your sister is making you feel like a complete whore.
Bitter about your earlier exchange, you don't want to give her the satisfaction of finishing you off. She doesn't deserve it. With determination, you ride the edge but fight from falling over it. She clearly thought she had you as a minute later she pops up for air with a disgruntled look.
"Are you going to cum or not?"
"M-make me..."
"Yeah? Make you? I'll fucking make you."
Dawn moves down, pulls her fingers out of you, and spreads your labia wide. With your formerly virgin entrance now held open, Dawn dives her tongue inside you. No longer phased by daddy's cum, she laps up your creamy filling as she tongue fucks your hole. You were expecting something more forceful so this unexpected change makes you twitch and writhe. Your sister's tongue flitting around inside you, reaching as deep as it can go, although wild and causing your whole body to shudder, isn't going to push you over the edge by itself.
It becomes clear she knows that fact once a cum slickened finger slides its way into your ass. Your eyes open wider, your breathing getting heavier, now that your sister is thrusting into your asshole while tonguing your slit. These are brand new sensations stacked on top of each other and it's hard for you to wrap your head around them. But when a different finger finds your clit you nearly melt off of the table.
"Just cum already. I know you want to. Cum in my mouth you dirty little slut."
The thought of cumming on Dawn's tongue is what really sends you spasming. When her taste buds enter you again your whole body seizes up. Your bum tightens around her finger as you feel a fresh gush cascade through your pussy, flushing more of daddy's cum, and probably some of your brother's by now, out into Dawn's waiting mouth. She tongues and sucks your tiny quivering hole, making out with your vulva, devouring your orgasm from your lips, a raunchy display that reminds you when you once saw her make out with her friend at a sleepover. Then, like now, she didn't hold back.
Your legs have stiffened, stretched out past her head. You throw your own head back onto the table, unable to watch your big sis ravage your pussy any longer. With a yell of ecstasy that you fail to hold back, you finally submit to your orgasm and reluctantly reveal that Dawn has finished her task. That scream was all she was waiting for. She pushes away from the table while you're still reeling, spitting on your pussy one last time before stomping away.
"Happy now?" asks your sister, a glossy sheen coating Dawn's mouth, nose and forehead.
"Thank you, Dawn," replies mom with a hint of sarcasm. "Did you find it dear?"
"Oh yeah. And there's plenty more if we need it."
You've rolled onto your side again now that Dawn is out from between your legs, and still convulsing with pleasure when someone grabs your feet. Daddy tries to wrangle you as he wraps a black leather cuff around one of your skinny ankles. There are a couple of metal rings sticking out from the leather in different places, like spots to hook something onto. You watch blankly as daddy tightens the leather, secures it with a clasp, then grabs your other ankle.
"We haven't used these in a long time."
"Wha-what?"
"Just relax sweetie." Mom leans onto the table to stroke your hair, her cleavage quickly popping from her robe again. "You're just getting a little too... excited, so we're going to help you stay calm."
"What?!" you repeat.
"This will just keep you from kicking so much, that's all. Then we can finish your punishment."
"No! No!"
Daddy has already cuffed your second ankle when you start kicking in protest, your arms twisting against the rope around your wrists, quickly proving mommy's point. Mom stretches to the side and plants a hand between your thighs. She runs her fingertips up and down your wet messy slit. Her middle finger barely splits your lips and glances off of your clit with each stroke, making your back arch as you flail. Your kicking slows as her soothing touch refocuses your attention to your hypersensitive sex.
"Shh. There, there. Don't be scared." She steadily strokes the top of your head right in time with your slit. Your bottom lip trembles as you stare up at mommy, her smile so warm, her fingers so soft, gentle, sensual. Gradually your legs come to a stop, hanging in the air, while you try to calm your shaky breathing.
"That's better. Good girl. Your young little pussy just has a few more orgasms hiding in there, doesn't it?" Her fingers find your clit and start spinning a tight circle. "You want another one?" Feeling overwhelmed, you nod and whimper with a light sob. "Of course you do."
A few seconds later you feel your leg get tugged to the side. Daddy has already clipped onto one of the loops at your ankle, a long black strap coming off if it. He guides your leg out past the corner of the table then crawls onto the floor, Dawn standing behind him with her phone.
Seeing your leg pulled out to one side makes your butterflies flutter again. You never asked to be tied up. It's bad enough with your arms stretched across the table, bound above your head, but spreading your legs wide open? Do you want to be completely at their mercy? For Dawn to slap your pussy again? For mom to order anyone or anything inside of you? You swear the answer is no, that it's only mommy's fingers that are making you wet, but you can't be sure. Maybe you do like this. Maybe nothing really matters so long as you're cumming.