I am thinking there is no easy way out, like in that song "no easy way out", and you basically have to do some really extreme stuff to make them get the F out.
Any advices?
For you it's too late but in general: never marry and never live together! Always go for a LAT relationship. That is, if you insist on having a relationship.
Easy to stop, easy to get rid of her and her family / friends, and you won't have to give her HALF of what you own. And you always have your own house.