Well, judging by the way everything happens, the girl has long dreamed of such sex and I think it's not for nothing she decided to pay in this way, there is either a lack of satisfaction in terms of sex or just experience is already there. Overall, he fucks her perfectly, she really likes it, judging by the moans and sighs, and the time has exceeded all her expectations, most likely he will appear in her bed more than once.
The sisters are those pussies, which you try to satisfy, see how he fucked them, and they do not give a damn, go around smiling. I think that all was filmed very cool, it is clear that the picture worked hard, and the main character perfectly grilled these young chicks, who apparently have not had sex for a long time, as they give him a good hand, the cock came to their liking, moaning like wild.
The son, of course, didn't do a very nice thing. He could have just masturbated instead of ruining Thanksgiving pie. But this story has a happy ending, because his mother was happy to punish him, but the punishment turned into something more.