Silent porn so your parents can't hear

This girl's boyfriend came to visit her to do pornography. but they have the problem that the girl's parents are at home, so they have to fuck in silence so they don't know they're doing it. the guy doesn't come quickly, but he penetrates her for a long time in different positions, giving her strength and making her moan. at a time when he is already far out, he grabs her by the neck and strangles her while with the other hand she covers her mouth so as not to moan and so that they cannot hear her.