Its a movie i remember watching. A Blonde hair teenager maybe 17 or 18 moves with family members and shes kind of like a nympho. Shes sleeps with the older man neighbor next door thats friends of her family.. And at a party while her female cousin is looking for her shes found in the kitchn having sex with the caterer... I dont know what made me think of this movie and no its not porn anybody know?

Sounds like "Poison Ivy," 1992, maybe.

Poison Ivy (1992) - Plot summary (http://www.imdb.com/title/tt0105156/plotsummary)