Offline/Leave your cousins for coffee
You get out of the cabin before you get any ideas, grabbing boxer briefs and shorts and a t-shirt, literally the first things you could see in your bag. Uncle Dave and Uncle Mike are already sharing coffee and stories and you join them with an awkward smile, trying to forget about the mess you just walked out on. That's hard to do given you know what you'd find if you went back in there, and nerve wracking thinking an adult might decide to go check on the kids, but once your uncles start vying for your attention with increasingly outlandish and unlikely stories you do relax a little.
Sometime later you can feel the camp begin to rouse and watch as Nicole exits the kids cabin wearing a t-shirt and jeans and clutching a towel. You catch her eye for a second but she scampers away toward the river with her head down, trying not to make eye contact with anyone else. A moment later Brayden and Beth exit the cabin in nothing but their underwear and follow Nicole's focused path toward the water.
"Those two were coloring each other, eh?" notes Mike, the illustrations covering the bodies of his barely clothed children plainly visible.
"Uh, yeah... They had some fun with that."
Emma and Asha soon follow in their nightshirts, the two of them huddled close and whispering as they wander away. But before they get far, Emma's arm slips around Asha's back, unintentionally shortening her friend's shirt as the hem is turned and lifted. This reveals part of Asha's round bum hanging out of her twisted panties and exposes the shooting star that Emma colored in on her friend's butt cheek last night.
"Seems yours weren't the only ones," notes Dave, pointing out the star. Laughing nervously, you suddenly remember the mix of colors smeared across your fingers. Your uncles have surely noticed that oddity by this point, but only now is it particularly damning. Hard to come off looking innocent with that kind of evidence out in the open. You very nearly start rambling defensively, worried what conclusions they might come to, but think better of it. Shoving that hand into your pocket is awkward while sitting, but you have to do something to try to hide your guilt and only hope they haven't looked at your hands.
Yulia and May are right on the others' heels, calling out to and racing to catch up with your sister. Yulia looks normal since her nightie covers most of her. May on the other hand has only pulled on her pajama pants, and her doodled torso suggests that Yulia must be just as bad.
A couple minutes later, after a few more aunts and uncles have come out looking for coffee, Beth jogs back to camp. She's dripping wet, though her panties are doing their damndest to soak up the water trickling down her body.
"Can we have soap?" she asks no one in particular. The artwork covering her skin has begun to bleed after a dip in the river but it's far from washed away. A rainbow of ink is not only streaking down her thighs from her crotch but seeping into the panties she just slipped on as well. There's little doubt to anyone paying attention that every inch of space between her legs has been graced by marker since her underwear has been transformed into a Rorschach test.
Beth is sent back to the river and Aunt Clara disappears into a cabin. Clara returns holding a big bottle of body wash, a bottle of shampoo, and several washcloths. You watch her walk closer, expecting her to offer a comment or two before heading down to deal with the young'uns, when she instead walks up to you and hands over everything she's carrying, offering the simple instruction to make sure they "wash everywhere". This may be your aunt telling you to clean up the mess you made, or at least that you allowed to happen on your watch, though the ink covering your fingers doesn't afford you much innocence. You reply with a quick yes ma'am and head off to the beach, thankful to not be getting into any more trouble than that.
Despite Beth's request, the kids aren't interested in getting cleaned up from what you can see. They're busy frolicking naked in the water when you arrive, splashing and dunking and diving with little concern. Asha is quite shy about it, covering herself (when she remembers to) while playing with your sis, but Nicole is even moreso, staying far enough out to remain submerged to her chest but close enough to shore that she has to squat in the water to do so.
"Uh... Beth?" Your little cousin looks at you briefly. You shake a bottle in the air, showing what you've got, but Beth promptly ignores you and continues playing, unconcerned.
"Just put it there," Nicole calls out, pointing in the direction of the pile of clothes next to the rocks. She must be the one that asked for it. You almost set it down too, but Aunt Clara set pretty clear expectations. You weren't sent down here to act the part of delivery boy, and if you head back now you sure won't win any brownie points.
"Yeah, I've got it," you reply, holding the bottle up again. She looks disappointed that you won't drop it and leave but you just smile, proudly holding what they all clearly need.
"Okay... thank you..."
"Aren't you going to come and get it?"
"No," snips Nicole, but then she thinks better of that. "Can you... bring it here?"
"Uh, not really. I don't want to get wet."
Nicole huffs and stubbornly stews in the water, the other kids playing happily. But that won't do. You've been sent here for a reason and you start calling individual cousins to come get cleaned up. Not that they are listening. If you have to threaten to take all of their clothes back to camp with you then so be it, and you're forced to bluff exactly that before you get any takers.
Yulee is the first to take your threat seriously and walks up to where the water is ankle deep, her hands nervously clasped in front of her. You slip off your shoes and step out to meet her, tossing the shampoo bottle on the beach. She's the least inked of anyone here, but what she does have colored is in the most inappropriate place. You wet a washcloth, squirt some soap into it... and hand it over to her. It's tempting to do more, but hard to justify it. Watching cute little Yulia gingerly step her way up to the shore, dripping wet, without a stitch of clothing on, has made you plenty lucky as it is. She is oddly nice to look at.
While Yulee starts pawing at her bunny, May suddenly appears beside her sister presenting herself for inspection. She appears to think she's all clean and sticks her arms out to prove it, but you turn her around and find plenty of faded ink on the half of her body she can't see. This you'll have to help her with and you only start to rub a cloth along her back when you spot Nicole sheepishly walking to shore.
Clearly embarrassed, Nicky holds one hand between her legs and one arm across her chest in a protective pose as she tries to sneak past you. You watch her from the corner of your eye, observing that she must have rubbed pretty hard to get some of that ink off of her hip, but she has a lot more to go. Meanwhile, sneaky Nicky grabs the bottle from the beach and hurries back to the water.
"That's shampoo," you advise, which stops her cold. The water is only up to her knees when she turns around, carefully positioning the shampoo bottle in front of her pelvis. After some indecision, Nicky walks up behind May and impatiently waits for you to acknowledge her.
"May I have some soap, please," she asks politely, though with more than a hint of humiliation.
"Sure. Hold this," you nod, passing May's washcloth to Nicole. She grabs it right away, holding it in front of her when you start to tilt the bottle of body wash, but it takes that long for her to realize she's no longer covering her chest. She brings her shoulders together in an attempt to cover her pale pink nipples and keep from flashing you, but she mostly squishes her small boobs together, each pointy little tit still too underdeveloped to form any amount of cleavage.
You've observed all of this with interest and are purposefully dribbling body wash onto her washcloth to draw this out for as many more seconds as you can manage. This leads Nicole to the more drastic decision to lift the shampoo bottle away from her thighs so she can use it and her arm to help cover her chest instead. Now you know you don't understand girls. You would've thought showing boob is less embarrassing than vagina, but the only thing you would care to cover is your penis, so it's not a fair comparison. You're also staring pretty hard at her boobs, so it's hard to blame her for feeling self-conscious.
"Can I have the shampoo though?" you ask, stopping Nicole right before she can wander to deeper water for some privacy. Sighing, she passes the bottle over, flashing her boobs once more before she leaves. You're so thankful for that short show, but your cock is already getting restless when Emma and Asha grace you with their nude shimmering presence.
"Can we get some, Jay?"
Why does your sister have to sound all sultry-sing-songy when she asks for things? Specifically, right now. You pass them one washcloth to share and slowly load it up with a heaping helping of gel. It takes even longer than with Nicole for the bodywash to seep out of the bottle, your hand barely tipping and refusing to squeeze the plastic container as you distractingly inspect the pair of girls before you.
Looking past the plentiful marker covering their skin, you're captivated by the inviting V descending your younger sister's pelvis that directs your eyes to her smooth pussy lips, water steadily dripping off of her sex between her pale skinny thighs. Meanwhile Asha's crossed tanned legs and less boxy figure contrast the gentle hips that your more girlish sibling has not yet acquired.
Once those two have what they need you try to turn your attention back to May, but the besties don't really go anywhere. They hardly move a few steps away before sudsing up each other's bodies while standing in the shallows. You can't get mad at them for doing that, but you sure are frustrated for having to watch it.
You try to blame those frustrations on Yulia and how she's taking her sweet time with her washcloth, merely dabbing at her crotch. She's been chatting at you the entire time but you haven't caught a word of what she's been going on about. So, squirting some gel into your palm after giving away her washcloth, you rub down May's body directly, your hand sliding up and down her small back and across each of her adorable cheeks.
Despite your hand exploring May's cute young backside, your eyes raise to watch Em and Asha explore both of theirs. Chatting and giggling while soaping and washing, changing whose turn it is every ten seconds, you watch as Em jokingly spreads her butt for Asha only for her bestie to boldly press her hand between those narrow cheeks a moment later, wiping through them shamelessly. They laugh at that, but then it's Emma's turn. She attentively runs a cloth over Asha's round ass with a bit less giggling, only sneaking through her cheeks at the end before they switch again. Asha has to return the favor, gripping Em's side before creeping her hand down through her ass, sending both giggling again as Asha's hand dips lower and lower.
Their antics aren't as overzealous as last night, but those two sure need to work on boundaries before they get themsel--
"I'm not that dirty!"
May said that. You look down to find your hand buried in the first grader's bum, your soapy fingers gliding underneath her, threatening to dip into her delicate holes as you idly scrub back and forth between her teeny pinprick of an asshole through to her pillowy lil' cooch. It's a good thing she's smiling as opposed to horrified and it's a good thing she said something before you went any further, actively fantasizing about the hand reaching down between your sister's legs.
"Uh... yeah, you are. But, um, you're good now," you quickly explain, pulling your hand up and rounding the outside of May's tight bum a couple of times, finishing her 'cleaning' as she giggles at you. She isn't exactly perfect, some faded patches of color still visible on her back that you paid little attention to, but you really ought to let her go before you go full Wade on her.
"Is it my turn now?"
"Huh?" Looking up, you're surprised to see Nicole looking back at you over her shoulder. She's got a funny look on her face, somewhere between a glare and a smirk that you can't quite figure out. She might be mocking you, or...
"Are you perving out again," she prods, "Or are you planning on washing everyone?"
What? A perv? Well you'll show her...