There are two things you could do, to re-emasculate yourself from the influence of this family: the girl, the mother the parents, the boyfriend.

One: You can make your good friends at McDonald's to fry a rat in their sandwiches the next time the mother goes, or the boyfriend. Spare the girl, you're in love with her, I respect that.

Two: Somehow, in a socially acceptable way, offer cash to the mother, not too much, for sex; after the tet-de-tet, tell the whole town what an ordinary whore the mother is, and she smells bad, too.