Teenage brother and sister have sex

These kids are overprotected by their parents, they are only a year apart in age and none of them can go out to parties or have a partner. All of their friends have already had sex and they always talk about it, how good they have a good time and how tasty it is to watch pornography. Both brothers are frustrated and one afternoon when they are alone they decide to get together to break the rules and watch pornography behind their parents' backs. They watch a video of a super busty blonde, the boy can't help but feel aroused and his penis gets harder than usual. He asks his sister to touch him and she gets turned on too, so they end up having incest in the house.