15 year old Bobby come home from work early and catches his mother having sex with a stranger. His mother, Marie, finds out that Bobby saw her and tries to explain the circumstances but he isn't interested in her actions. Later when they are discussing her infidelity they fall into each other's arms and the sexual seduction of both mother and son begins.
Brother lusts for older sister and he trades a front row ticket to a popular boy band concert for one night of pleasure, with sis stripping to her panties, anything goes as long as she has her panty on.