Offline/Seriously? Just get in there!
After peering in on them for a few minutes, your sister talking with her hands as much as rubbing, you start to question why you're out here fondling your meat like some creepy voyeur. You tuck it away, embrace your depravity, head back inside, and immediately get jumped by your little sister.
"Justice! You're better at this. Here, you do it."
She's already hopped up, grabbed your wrist, and dragged you down in front of Asha before you can say anything different. Gazing directly into your pretty little cousin's snatch is everything you were hoping for. Her face is already red, but she drops her eyes after you get parked between her legs. Asha's girlhood has a subtly different shape from Emma, her lips a little puffier and the top of her slit almost splitting into a sort of faint Y. you think that this is probably the closest thing you'll ever get to fucking Aunt Becky, so you don't gaze for long before you slip a digit straight up this fresh young cunt.
"Ah!" Asha yelps, then slaps a hand over her mouth. You probably could've been a little nicer with that, but after so much restraint it felt really good to just dive in.
All the same, you pull back a bit after some poking around. She's not at all like Emma, nowhere near as excited or as easy to poke around in. In fact her vulva seem better lubricated than her vagina, and perhaps it's the only part of her that is. Then it hits you... Sparkles. Emma just rubbed your trapped semen all over her cousin's crotch. You have to wonder if she did that on purpose. Does she even know what semen is really?
"It's okay. We don't have to," you state, pulling out after only a short diddling. Your finger is practically dry.
"What do you mean?" Emma asks, her voice filled with equal parts confusion and disappointment. Extra weird having your sister casually sitting beside you butt naked, as if probing your cousin wasn't weird enough.
"I don't think Asha's into this like you are sis. Although I don't know if anyone enjoys slime quite as much as you."
"I-it's okay," offers Asha. "I know there are no rules, so..."
Huh? Seriously? Is she implying you can just rape her?
"See?" remarks Emma. She pushes her friend's leg open a little wider. "No rules! Go on!"
It's kinda messed up that your sister wants you to forcibly fuck your cousin against her will. You do continue to thumb Asha's puffy slit a little, actually contemplating the 'offer', but you decide against it. You're not a monster. "Um, yeah. Maybe later."
"What? That's no fun... Okay, well can you... do me?" Emma plops herself onto her bed next to her cousin and presents herself to you. "Yeah! Do me! Do me! It's my turn!" The only reason she's acting like this is because her friend is here. She always gets stupid hyper with her friends around.
"Jesus! Alright. Cool it. Umm... hey Asha, wanna help?"
She slides off the sleeping bag eyeing the two of you with curiosity. "Uh... I guess so, yeah!" You think she's just happy to be on the other side of this activity. She reaches for the slime, since that's how she was prepped for this, but you assure her you won't need it.
You reposition your sister so she's laying down with her knees still pointing up in the air. You take up your expected position and have Asha get on her knees just next to the air mattress and hover in over Emma's crotch.
"Just take one finger and stroke this one spot over and over, kay? Any speed you want to, just keep going."
"Okay. I guess I have to!" Asha answers cheerfully, sharing a nervous giddy smile with Emma. Can't get much easier than that.
Meanwhile you sink down and split your sister open using your thumbs. Her tight nearly featureless little pussy looks so innocent, but so inviting. With her lips pried apart you can watch her tiny stretched-open hole pulse with little squeezes, trying to close. It takes a second for you to realize that they're timed with the steady strokes Asha is already levying against your sibling's hidden little clit.
Licking your finger for good measure, and unintentionally tasting Asha in the process, you thrust your way forward and properly fingerfuck your little sister in earnest for the first time. Emma sucks in her stomach and starts gasping, you hope from pleasure. In no time flat, wet squishy noises can be heard with every push into her hole.
"You should rub the sides too," you suggest after some solid thrusting. Emma is now taking heavy breaths and haphazardly pulling at her sleeping bag from time to time. Every now and then she even bursts out into giggles, you assume due to her cousin's light touch. You can tell Emma wants to sit up and watch but Asha is in the way. More than that, Asha is contributing. Your cousin followed your suggestion adding one more finger to the fun using her other hand. She is pulling that new finger up the length of one side of Emma's lips while the first one continues stroking the clit with the same timing.
Greedy and wanting to push further, you pull all the way out and hold your finger up to Asha's face.
"Lick it. For luck."
She only hesitates for a moment, then follows your order giving two quick licks. You get a perverse satisfaction forcing your cousin to lick your sister's sweet smelling pussy juice. Staring at your finger, curiosity getting the better of you (and wanting to compare) you take your finger into your own mouth to similarly sample your sister for yourself. She and Asha taste a lot alike surprisingly, but is that normal? You're not even sure what pussy is supposed to taste like. They both remind you of different strains of some kinda green apple, maybe a greasy sweetness to it, but Asha had a faint hint of cucumber, or maybe zucchini? They're all such mild and subtle flavors that you can't narrow it down. You think it's super weird to be comparing pussy to food, but frankly that's the best you can do.
Doubling up on the luck, you add a second digit and then slip your way back inside your sis. This is a tough fit and you have to wiggle your way forward, truly spreading her now. Curiously you feel a bit of a pop when you get in this time around, like you were caught up on something for a moment. Following that pop, Emma's legs close around you and a weak cry escapes her. Of course as soon as you start sawing into her with double digits her legs shakily part themselves so you can get to work..
You're really filling her now, her narrow insides clamping down on you from all directions. You push through the increased pressure, rubbing faster and twitching your fingers around looking for an even better reaction. She starts throwing little twitches here and there. Soft moans come out of her abruptly like she's holding them back. A minute later and she's shuddering, her legs closing again.
"O-ooookay! K-kka-ay! A-all done! That... that's... good. I'm good."
You and Asha pull away and Emma quickly rights herself. It seems she was holding her breath for so long that she's now panting like a runner, but not quite as sweaty. Your sister's head comes out of nowhere as she plants a peck of a kiss on your lips. She sits back again and smiles then hits Asha with a quick smooch as well. Weirdly the kissing is the most awkward part of all this, catching both you and Asha off guard. Emma softly laughs to herself, eyes watery from straining or emotions or something. But her slow, rolling, contagious laugh gets you and Asha chuckling in no time and it's a proper giggle fest for quite a while after.
"Oh!" exclaims Emma, her hands smacking the bed. "We get to do you now! Right? Ash! Take off his shorts!"