My sister has found out that her partner of 25 years has been cheating on her. She's seen the messages. He denied it up until he couldnt anymore. Gaslit her, called her crazy etc.
They have a mortgage together, joint tenancy so she has to share 50/50. He has barely paid anything towards mortgage and bills. Maybe 30% at an absolute push ( although I think it's less than this as he used to use her creditcards for his spending on the promise of repaying her).
What can she do? He wont move out. Still seeing the other woman. He is a functioning alcoholic. She feels trapped and I dont know how to help.