She does

You look at her doe eyes as she looks over her shoulder at you.

"You're going to shove it up my..." she starts, though it sounds more like a statement than a question.

You smile at her evilly and nod your head before she even finishes the sentence.

"Won't it hurt?" she asks.

"Just relax, and let me do all the work, sweetie," you say, trying to sound reassuring as you continue to slide your cockshaft through the sodden split of her pussy. You grab the greasy cockshaft at the base and point the big purple head at the entrance to her womanhood.

Sarah makes an excited squeal and lifts up to her toes as your cockhead tantalizes her clitty. Your cockhead now coated in girljuice as well, you use this new angle Sarah has put herself in to better enter that tight asshole.

You fill the palm of each hand with the tight flesh of her asscheeks and move them apart to better accomodate your pricklance. Your dick is hard enough to not need any more guidance, as you shift your body to align the head with the cute babysitter's tight asspucker.

"Oh,John!" she squeals in both excitement and amazement as the eighteen-year-old feels your cockhead bull it's way through the entrance to her ass.

You release the fleshy moons of Sarah's ass and grab her around her small waist as you slowly push into the girl's bowels. And then, you hear the doorbell.