Get your cock between those apple-sized breasts

Slowly you straddle Heathers chest, squeezing her pert breasts with both hands gently as she moans with delight. Taking your cock in one hand, you let it feel the contours of her firm breasts, gently slapping them with your penis, and leaving a glaze of precum whereever you put it.

Sliding your penis between her breasts feels like it is the best idea you have ever had as she begins to rub her tanned youthful breasts up and down your shaft, licking the head with her tongue whenever you slide forward. You remember the first time you met Heather, when you came around to meet your girlfriend's parents, and then remember dreaming that night about exactly what you are doing now, sliding your cock up and down between these wonderful breasts as your girlfriend's sister lies sprawled on the floor under you.