Offline/Punish Asha and Emma, they're both guilty
Throwing open your bag, you stand in the buff still wiping your face. "Fuck no. Not cool. Both of you outside. Now."
Asha is caught off guard by the sight of your dick, like she forgot you had one of those. She gawks for a second then sharply looks away in shame. "I- I'm sorry, Justice. Really, I di-"
You cut off your cousin with an angry shout. "Now! Go!"
The girls scamper up off the floor and rush outside ahead of you. Stepping out barefoot onto the wet ground after yesterday's storm, it's more than light enough to see without a flashlight, the sun already well over the horizon and visible through the trees. The girls stand off to the side of the trail huddled close together. The air is still crisp though, and being that you're all still naked after last night, nipples and goosebumps alike are quick to show themselves in the slight breeze.
"There's no way I'm letting you get away with that shit. So lay down. You're going to find out exactly what it's like to get peed on."
Your cousin glances at your sister then gingerly drops down onto her back in the damp grass.
"You're just as guilty Emma. Get over her, feet on either side." She looks like she'd like to say something but smartly holds her tongue. Instead your sister follows your orders promptly, straddling her friend's body. "No, no, move up. Squat over her face."
"Wait! You... you said there's no rules!" protests Asha as your sis moves closer.
"Yeah, exactly. I can think up way worse things to do to you. So you're both gonna listen and do exactly what I tell you unless you really want to get punished."
That shuts her up. You walk around to stand opposite your sibling while she squats over your cousin. Your sister's expression is mostly blank whereas Asha's is already filled with dread and a whole lot of regret.
"What if... what if I don't have to go?" asks Emma.
"You do. So don't play around." It's possible she doesn't. Maybe she went before they woke you up. But you're not going to let her talk you out of this. "Just do it, sis. Piss all over her."
You point your dick at your sister like a loaded weapon but refuse to go until she starts. She takes a while, possibly trying to think up some way to not have to pee on her friend, but after some fidgeting she lets out a weak stream straight onto Asha's delicate features. As soon as your sister opens up on Asha's face you squeeze your own pee through your unexpectedly stiffening dick, the high pressure liquid smacking your sister square in the chest. Your voluminous release sprays off of her body due to the powerful initial impact and, since she has her head down to watch her friend, splatters up into her face. That surprises Emma enough to make her stop peeing and you pinch your dick in kind to wait for her.
"Don't stop. Keep it going."
"Sorry..." Your sibling bites her lower lip and squats a little deeper, now inches from Asha chin. After a reset she continues her release. She also pulls up on the front of her thin slit to help spray across her friend's face... and up her friend's nose. Asha's eyes and mouth are tightly shut, but she still has to breath. Getting a nostril full of piss makes her choke and cough, opening her mouth for air only to draw in even more liquid. Now Asha must know how you felt, her face little more than a toilet right now.
Wanting to dole out an even punishment, and being a bit of a sick fuck, you aim higher to fire into your sister's face as well. You can picture Emma giving Asha the idea, so she also needs to be on the receiving end of this. She angles her head to the side and closes one eye but tries to keep her attention focused on what she's doing to her friend below her, whether out of a sense of burden or curiosity you can't tell. Meanwhile much of your powerful stream pours off Emma's chin raining down onto Asha's forehead, though the rest cascades down Em's neck and torso leaving behind meandering trails of warm fluid.
In the end the whole thing is over in less than a minute, all three of you left naked and dripping with each other's pee. Asha's face is drenched and her hair is soaked. Emma has also been well punished, her chin dripping steadily while little beads of liquid cover her skinny young body. Stillness takes over as you stare at each other quietly in the aftermath, the quiet sounds of the forest rolling in now that the sounds of water smacking skin have subsided. Since the girls are wet now too you don't feel so mad about having taken a little pee to the face before. In fact you thought you'd never forgive them when it first happened, but watching all this was... was... way hotter than you expected.
"Now, uh, lick her clean," you direct to your cousin, wanting to stretch their punishment.
"Lick her?" she repeats.
"Yeah, that's right. Stick out your tongue and lick my sister's pussy until it's clean. Inside and out. I just, um... want you to feel embarrassed, so you better get a good taste. Suck out every last drop."
Asha definitely looks humiliated, but eager Emma tries to 'help' by repositioning herself over her friend's mouth, dropping to her knees to find a more stable position. Asha, following her personal definition of 'no rules' to the letter, obediently opens her mouth and laps at your little sister's dripping slit. Although you doubt she can taste the difference, in addition to lapping up Em's pee along the inside of Emma's slit she's no doubt lapping up your pee on the outside. After just a few seconds of this, your sister, still being helpful, pulls her little lips apart to help guide Asha further in. Emma bends forward trying to get a better look at what her friend is doing. You swear that she actually likes all this shit. Although you really shouldn't talk.
True siblings, you and your sis both stare down with interest at your submissive cousin munching away at her first pussy. You can't help but give yourself a few quick strokes. This is just so wrong and so crazily hot. But Asha shouldn't be punished alone. Again, only wanting to be fair, you step closer to your sister. You grab Em's wet chin, tilt her head back, force her mouth open, peel back your foreskin, and gently slip your swollen glans past her thin lips.
"You too," you state coolly. "Every drop."
Emma, wide eyed, sucks just a little but mostly tries to take in a breath with a dick in the way. Then she starts tonguing the tip of your cock behind her closed lips. You're already very hard but you have one more surprise to deliver while you still can. Focusing and relaxing - an almost impossible feat with Emma sucking you - you squeeze out a couple extra squirts of pee directly into your sister's narrow little mouth, splashing her tonsils. It's far from a mouthful, but Emma raises her eyebrows with a look of shock. You fully expect her to pull away and spit or let it pour out the edges of her lips, but after staring at you for a moment your incredible baby sister just scrunches her face, dips her head, and swallows your warm little surprise without even breaking the seal she's made around the ridge of your cock.
"You did... you really just..." you trail off, stunned by your unflappable little sis.
"I- I think I'm done now," states Asha sheepishly.