Niki is 'still with him' because currently she has no other choice, she is on the hook for this too.
There is no way Pat would 'leave' if asked. (they prob live in separate hovels anyway, hence the no renting)
Providing Piggy gets his own way she won't suffer his sperging at home.
That will all change when piggy has had all his toys taken away by Jerry.
Pat himself hasnt really experienced any real repercussions yet, he didn't even pay for the lawsuit.
He probably told SFWA to go fuck themselves, them being cucks took it up the ass and wrote off the debt and thinks he can long it out with Quasi too.