She said that she started to spend a lot of time at her uncle's place after her mother got a new boyfriend that she didn't like at all. All started between them after her uncle caught her fucking her boyfriend at his place. He just watched the all scene and at end, after the boy left, he told her: "With a real man you don't need to fake an orgasm". She got curious about it and her uncle decided to show her what he was talking about.