Her ass is ready... Her throat is not!

You spear your sister's pussy with your hard cock, giving her a vigorous thrusting for a few seconds, and lulling her into a false sense of security that her ass is safe.

"Huhhn, huhhn, huhhn," she whimpers with regretful pleasure as you piston her.

Then you pull out completely, grabbing your dick at the base, and re-enter her moist snatch once, twice...

"Huhhn... huhhn... huuoAAAYEEEEEEE!" Rachel suddenly shrieks, eyes wide: after the third pullout you aggressively thrust yourself into her asshole, quickly and forcefully squeezing your pussy-lubed cock in down to the hilt.

"EEEEEEEEEE! OW! OHH! AHHH OW!" she continues to scream. "AAHHHHhmmmffmmm..." Tommy takes advantage of her cries by stuffing his cock into the back of her mouth, muffling her. He starts to poke her throat with shallow thrusts, teasing her gag reflex and causing her to sputter and buck.

"GACK! GACK! GACK! GACK!" Thick saliva starts to splash out of the tight spaces between her lips and Tommy's dick, dripping down into her eyes and hair.

He relents from gagging her for a split second. "Get some air while you still can, you little slut!" he shouts. She takes one ragged gulp of air before Tommy forces his way into her resisting throat in one brutal thrust, down do the very base. With on hand, he grabs the base of his cock behind the balls and shakes, rubbing his balls over her nostrils. With the other hand, he caresses the bulge in her neck made by his dick.

10 seconds.

As her gag reflex causes her to retch again and again with nowhere for it to go, Rachel starts to shudder. She tries to free her arms from under Tommy's knees but doesn't have the strength left. With her arms still trapped, she desperately flails her legs trying to push your still-buried cock out of her ass. You grasp her thighs and hug her legs to your chest, holding on like you're riding a bronco at a rodeo.

20 seconds.

"FUCK dude, her trying to gag on my dick feels AMAZING!" Exclaims Tommy. Her bucking ass feels pretty good on your dick, too.

30 seconds.

As Rachel's face starts to turn from beet-red to blue, you FINALLY feel concerned for your little sister's well being. Tommy notices.

"Do you really think it's possible to **** a girl to **** in this magical Blowjob Universe, or are they all invincible fuck-holes?" he asks with a sinister grin. Watching Tommy utterly **** your sister's throat like this is incredibly hot, but frankly he's starting to frighten you a little bit.

"I'd prefer not to find out," you reply. Maybe you DO have moral limits in Blowjob Universe, after all.

40 seconds.

"Fine, okay, FFFFFFUCK!" Just as Rachel looks like she's about to pass out, Tommy unsheathes himself from her throat. Immediately a bucketfull of saliva, phlegm, and vomit spew out, smothering Rachel's face, hair, and chest, and coating Tommy's dick. A slimy puddle now sits on the bed, centered around your little sister's head. Tommy jumps up from the bed in disgusted surprise, long tendrils of saliva hanging and swinging from his cock.

"Holy shit, bro! I made her barf all over me, gross!"

Rachel continues to cough and gasp and retch while she tries to escape the mess with her freed arms. Unfortunately for her you are still grappling her legs, with your cock balls-deep in her asshole. As she tries to crawl out of her puddle of spit and puke, you hold her firmly in place.

She finally sucks in enough air to complain, "Oh my god, you sick bastards, ewwwww disgusting!"

"If you can't take what you dish out, Sis, you shouldn't be dishing it out," you say. Keeping yourself planted inside her, you spin her around your cock and press her face-down into the mess. She reaches behind to try and push you out of her and off of her, but she doesn't have the strength.

With both hands you grab her hair for leverage and pound away into her ass. Despite her sphincter being worked-in a little from when you and Tommy gave her the DP, her asshole is still as young and tight as ever.

"Ai! Ai! Ai! Ai! Ai! Ai!" Rachel gives a little yelp of pain each time your cock bottoms-out and your balls slap against her pussy. You decide to shut her up by smothering her face down into the gag puddle on the bed.

"Mmmmbmmfff gulgulgulgulgul," she mumbles and gurgles through the thick mess, unable to breath once more. When you finally yank her head back up by her hair, she gags and gasps all over again. You repeat.

"Oh fuck, Sis, your ass feels so good! Come on, clean up your mess, I wanna see you use your tongue!"

By this point she is no longer struggling to push you off her, but she isn't enthusiastic either. After a couple firm slaps on her ass, though, she turns her face sideways in the puddle so you can watch her swirl her tongue in it.

After a few minutes of fucking Rachel's ass and smothering her in a puddle of her own fluids, you realize that you've become so absorbed with degrading your kid sister that you forgot Tommy was still there. He's still standing by the bed with a dumbfounded look on his face.

"Damn, dude, your sister is one filthy little whore, she's perfect for you!"

"Yeah, I have the whole Blowjob Universe at my disposal and I can't find a reason to leave her room, haha!"

"Well, speaking of blowjobs, I was wondering if maybe you could take her throat for a spin so I can have a go at that ass?"