Give her a hand, and some tongue.

Rebecca just keep smiling at you as you reach for her, pulling her own hand back to give you full access as you hesitantly start caressing her exposed skin. The feeling of your young niece's firm hips and buttocks under your palms quickly make you forget your uneasiness however, and you're soon fondling and groping her naked behind while your growing excitement overrides most other instincts.

"Yeah, I like that..." She moans as you knead her buttocks with increasing strength, pushing herself back against your exploring hands and spreading her legs a little more to give you a better view of her sweet pussy while she continues to slide her fingers up and down between those velvet lips.

Unable to resist the temptaion any more you finally take a firm hold of her buttocks, spreading them wide apart to give you the best access possible as you slowly get down on your knees behind her.

"Oh...?" You hear her say just before you dissappear out of her sight, a hint of surprise in her voice and lovely face, then she gasps again as your intentions becomes clear and she can feel your tongue make contact with her moist sex. "Oh my...!"

You immediately start lapping away at her young pussy, eagerly pressing your face up against her ass while tasting her juices and trying to reach her most sensitive spots. With her own fingers withdrawing and leaving herself completely open for your **** you soon find her clitoris and start working it with the tip of your tongue, drawing a series of pleasurable moans from her lips.

"Oh... Yeah...!" She gasps, pressing herself back to your face while quite obviously enjoying the tonguing you're giving her. "Damn.... You're good at that...!"

Encouraged by her reactions you just keep going, licking and lapping for all that you're worth until you feel her tense up and even more juices start flowing out of her and onto your tongue. After several moments of gasps and squealing, Rebecca finally tries to fend you off, pulling at your hair while covering her dripping snatch with her hand.

"Enough...!" She gasps as you eventually give up and reluctantly get up to your feet, looking back at you with rosy cheeks and lust burning in her dark eyes. "Please...! I need something more... Inside of me!"

For a moment you just stare at her, confused and still intoxiated by the taste and smell of her sex, before you finally understand as you look down and see her fingers spreading herself wide open for you...

Just before your hands start to unbuckle your belt, a brief thought suddenly passes through your head, again reminding you that this is still your niece. Watching her strip and licking her pussy is definitively wrong, but still nothing compared to actually fucking her and risking to get her pregnant!

The thought lingers for another moment, making you hesitate but not stopping you from dropping your pants and freeing your now raging erection... If you really want to hold back, this may be your last chance.