He promises his sister to treat her well if she lets her pussy penetrate

The guy in the dick in the video hurts so much from the time he was not warm up that he does anything to convince his sister to have sex with him. She tells him that if she lets her pussy penetrate, she will treat her very gently, spoil her and be like she is his girlfriend. She gives in to the fantasy that her brother fucks her and, although at first her uncle starts with a lot of hugs and love, he fucks her a lot harder and ends up filling his face with semen, as if she were a cheap whore.