Boy learns about sex to fuck his stepmother

The boy sees his father fuck his stepmother. He gets very horny and doesn't miss a beat. His stepmother's big tits look very tasty and the father fucks her hard while she enjoys it. The boy meets a girl who teaches him everything he needs to know about how to drive women crazy with desire. Once trained, he gets into the stepmother's bed, sticking his dick in her pussy while covering her mouth... He doesn't want to wake up the father who sleeps next to him