"Celeste, get behind your sister, wrap your arms around her, and give her a big kiss."

Celeste embraces her little sister from behind, her large breasts pressing against Lili's back. Lili looks up at her sister and they kiss each other deeply. You tell them to hold position, saying you'll let them know when to break the kiss. After snapping a couple pictures, you tell Celeste to move her arms up a few inches and loosen her embrace slightly. She does so and her hands are now directly on her little sister's breasts. Lili's legs fidget slightly as her sister cups her breasts, but she holds position. You take a few more photos of the sisterly embrace.

As your about to tell the girls they can break the kiss, you see Lili move her hand up and caress her sister's cheek. Her legs rubs together and it's clear that she's getting aroused by her sister's embrace. You decide to subtlety push this a bit farther and tell Celeste to move one of her hands down until you tell her to stop. She does as you request and you stop her just as her hand reaches her sister's pelvis, her fingertips just barely grazing Lili's pussy. You see the pale girl shiver ever so slightly at the touch.

You tell the girls you'd like them to make the kiss more intense, and if they're comfortable with it, use tongue. With out any hesitation, Lili reaches up with both hands and pulls her sister deeper into the kiss, her tongue pushing into her sister's mouth. Celeste's body goes stiff with apprehension, but she doesn't break the kiss. Her apprehension causes her to involuntarily squeeze her younger sister's breast. As it happens you notice Lili's body tremble as she tightly grips her sister's hair, kissing her even more fiercely with slight moans escaping her busy lips. It's clear to you that she just had an orgasm and you decide to have them break the kiss before Celeste realizes what happened.

Celeste gently pulls her lips away from her sister's, causing the younger girl to loosen her grip on the older one's hair. Lili is in a momentary daze, but slowly comes out of it and her eyes widen as she realizes what just happened. She looks to you with concern, hoping that you didn't notice. You put your finger to your lips, letting her know that her secret is is safe with you. She gives a sheepish smile before Celeste walks over to you, oblivious to the pleasurable experience she gave to her little sister.

"How did we do?" Celeste asks as she catches her breath. You show her the photos on your camera, "Woah, those are a lot more....suggestive than intended. I hope I didn't mess up this opportunity you've given us." She looks at you apologetically. You tell her they're perfect and say that her and her sister have a natural affinity for posing together. You tell her that you want to sign them on as a modeling duo.

A look of shock and excitement washes over her tanned face, "What, Really?!" She jumps up and down, her bouncing tits barely contained in her bikini top. Celeste runs over to her sister and hugs her tight, "We did it, Lili! We're gonna be famous models!"

"Really?" Lili looks to you with a hazy smile, as she slowly comes down from her orgasm. "I promise you we'll be the best models you've ever seen."

You give the girls your address and tell them to come over tonight to sign their contracts and maybe take some more bikini photos, this time for their official modeling profiles. The girls thank you for everything and head out apparent excitement.

You head back to your apartment and get ready for tonight.