Mother fucks with her son to teach the girlfriend to be a whore

This mature woman is very concerned that her son is dating a young girl who does not seem precisely the most vicious in the world, but rather the opposite. That is why one day the mother fucks with her son in front of the young girl to show her how to be a whore and tell her that this is how you have to fuck the boy so that he is always satisfied. The mother starts with a great blowjob and then tells the son to take care of going through it well, that she will move her pussy to give her pleasure while doing it and so enjoy.