whats this scene?

I first saw it on tv one of those late night channels might have been on hbo cinemax or something around the earlier 2000s its not newer than 2010 though the scene involved I beleive a young pool boy or neighbor who has sex with this cougar i think she was blonde but it was her birthday so I guess it was her surprise that was the basic plot of it then after that scene there was a couple who went on a camping trip and had sex might of been part of the show as another scene not sure I only remember the first scene if anyone knows it or can figure it out let me know thanks