Give Heather the smaller bottle

"Here, Heather... You can drink this one." You say with a sigh as you hand the big breasted blonde the bottle of lifesaving medicine and gleefully prepare to drink an entire bottle of your favorite **** before someone catches you with it.

You try to justify your decision by telling yourself she needs it more than you, even though you've been getting significantly less doses since your family decided to turn you into the house urinal; cumming in your mouth quickly became an afterthought if it's even slightly inconvenient. Pete will even occasionally pull out of your throat and jerk off on your face, just to hose you down to piss it away immediately afterwards for fun; laughing as you complain more about the lost piss than the lost medicine.

"Alright then! Let's have a race!" Kyle declares, deciding Heather has cleaned his raging erection enough and he needs some action, pulling it out of her mouth and quickly walking behind you, preparing to shove it into your asshole. "Whichever slut finishes her bottle first while getting fucked in the ass gets both doses! Get in position, Baz."

Bazzle gives you a look of sadness as he peels his wet cock off of your face and pulls his balls out of your mouth, walking around to take his spot behind Heather, lining it up with her tight asshole, and wishing it was yours instead.

"On your mark! Get set! Go!" Kyle calls off, grabbing your hips and thrusting his cock into your unprepared asshole as he gives the signal, causing you to spill your first sip from the bottle of mostly piss onto your face as he pulls you towards him, violently hilting himself in your rear. "Hey! No cheating!"

You're pretty used to getting a surprise ass fucking while living with Pete, and Kyle's member isn't even as big as your brother's; not to mention he's still well lubed from Heather's sloppy cleaning. Compared to being **** to bounce up and down on your brother's lap, milking his cock for hours on end with your asshole while he watches porn on his phone on your back, Kyle's attempt to be brutal feels rather pathetic, even while sober.

You recover quickly and begin gulping down your first mouthful of lukewarm urine with a small amount of cum in it as your skinny friend works up a rhythm pounding into your asshole, immediately beginning to feel better about your day and the contest as the effects of your favorite **** reach your brain. You start feeling more confident about your chances in this contest as you finish half the bottle in three huge gulps while beginning to push back in perfect timing with Kyle's thrusts like a professional piss whore.

Heather takes her first timid swallow of Bazzle's bottle of cum with a little bit of piss as he gently begins inserting himself into into her rectum, trying not to hurt her. The effects of the small amount of jizz diluted **** hits the virgin slut hard since she has no tolerance for it, causing her to push back violently on to the shy nerd's crotch, forcing him to grunt as her tight rear makes impact with his pelvis.

"Oh my GOD! This is, like, so good!" She shouts, taking another a huge gulp of the mixture in her bottle as she begins pushing back on Bazzle harder and faster than you, practically jerking him off with her asshole. She chugs down half of her much smaller container quickly, but much slower than she would like, hindered by the viscous jizz not pouring out very fast into her waiting mouth.

Just as you're about to declare victory, taking the last massive swallow from the bottle of Kyle's piss, Matt appears from out of nowhere and hands you another fresh warm one. "Here, Cumrag. I, uh, made you a present too."

"Wow, thanks, Matt..." You say, nearly tearing up as you suddenly realize the reason your fat friend disappeared was to fill up a bottle for you himself, since he was feeling bad about being the only one who didn't get you a gift. Best of all, since he's adding his bottle to the contest, he walks around behind you to fuck you in the ass along with Kyle as you drink it. Your sweet and wonderful friends know how much you love to be double penetrated when you're drunk on their piss. They're so good to you.

You forget about the contest for a minute, lost in sudden orgasm as Matt stretches your asshole enough to accommodate his fat cock along with Kyle's skinnier one. It's not quite as nice as when you can get your father and brother to do it, usually after begging for a double penetration while drunk on piss, but its enough to make you convulse with pleasure, nearly spilling the new bottle of your favorite ****.

"Fuck me harder, you pussy!" Heather shouts, now three quarters of the way done with her bottle and drunk enough to want more of the pleasurable pain from the shy dork using her asshole. She has mostly given up on the contest, instead concentrating on insulting him enough to want to hurt her more. "Harder! HARDER! Slap my fucking ass, you stupid fucking nerd!"

She successfully provokes Bazzle into giving her rear a few light spanks and a bit of shy thrusting; but happily for you, she convinces the other boys to do the same to you even harder. They slap your ass hard enough to leave dark red hand prints and begin twisting your nipples as you get lost in perpetual orgasm, barely able to do anything other than push back at the two cocks pounding into your asshole.

"Don't forget to drink, Cumrag!" One of your helpful friends says as he puts the bottle to your lips and squeezes it inside. You cum even harder as you're ****-fed their piss while getting double penetrated on your first day back to school, like a dream come true! You try to concentrate on swallowing every drop as they **** you harder.

Heather sees you guzzle most of your second bottle and quickly pours the remainder of the cum into her mouth, gulping it down at nearly the same time as you finish. The boys watch you swallow closely as they determine the winner of he contest.