"Celeste, you seem like a strong girl. Could you let Lili sit on your shoulders for some pics?"

"Like in a chicken fight at a pool party? Yeah, I can do that." Celeste gets on one knee and looks to her little sister with a sly grin, "Get up here, sis. Your finally gonna know what it's like to be tall." Lili sits behind her big sister's head with her legs hanging over each of Celeste's shoulders. With Lili in position Celeste rises up to stand and almost falls over, but manages to stay upright, "I think that champagne is starting to get to me." She giggles.

You snap a couple pictures of the girls doing silly poses like their playing chicken fight. You then ask Celeste if she'd be able to jump with Lili on her shoulders. The tall beauty nods assuredly, "Yeah, she's not cumbersome whatsoever." You tell her to just keep jumping as you take as many action shots as possible, you say you'll tell her when to stop.

Celeste agrees and begins jumping up and down causing her breast to bounce wildly. As you take photos, you notice a look of airy joy on Lili's face. You realize that with every jump her pussy is grinding up against the back of her sister's head and she's clearly enjoying it a lot. You tell the girls their doing great and that they just need to keep it up for a little longer. You wait for Lili to reach orgasm and snap pictures at the moment of her climax. You watch her eyelids flutter as her eyes roll back and her legs squeeze tightly against her big sister's head.

Celeste stops jumping, "Woah, why are you squeezing so hard....?" She gets on one knees and forces her sister off of her, "And why is my hair wet?"

Lili quickly covers the moist crotch of her swimsuit with both hands and tries to actual casual, "You were sweating a lot from all the jumping." She tries to cover for the wetness, "It caused me to slip and I panicked and squeezed to stay on." The pale girl rambles.

Celeste seems to buy the excuse and looks to you, "Sorry for stopping early, Ms. Divyne. I can try again if you want." You tell Celeste that it's perfectly fine and you got the shots you wanted. "Can we see?" Celeste asks politely. You show them the pictures including the ones of Lili's orgasm. Celeste laughs at her sister, Look at your goofy face. Was that when you thought you were gonna fall? Haha."

Lili swallows hard, "Y-yeah." She looks to you with a nervous guilt in her eyes. You tell the girls to take a short break and tell Celeste she should help herself to more champagne if she's feeling tense after that shoot. She does so and you pull Lili to the side for a chat.

Before you can say anything, Lili speaks up, "I'm sorry." She says abruptly. You ask her what she's sorry for. ""You know.." Her eyes dart over to her big sister then down to her crotch. You tell her to say what she did. Lili looks to the ground timidly and responds in a whisper, "I....orgasmed." You ask if she also had an orgasm at the beach earlier today. She nods silently. You ask if she enjoys her sister's touch and she stays silent for moment before nodding her head again.

Lili looks up at you with a face full of guilt, "I know it's wrong but when I felt her at the beach today....I just never felt excitement like that before. Please don't tell her."