On mobile so sorry in advance for formatting.

Long time lurker and been wondering if I should even post this. My wife is a mess and I want her to get help. She has had a pretty traumatic life. Father died when she was 15. Her mother abandoned her a little over a year later for another man and left her with her 3 older brothers. She has severe abandonment issues that continue to manifest constantly in our marriage. She drinks heavily on almost a daily basis. To make matters worse we agreed to allow her mom and stepdad move in with us 4 months ago after we had a baby. They told us they wanted to downsize and we had a huge finished basement with a walkout door. At first it was ok but now they don’t like it and have decided to move out. They didn’t sell their house when they moved in with us. They are leaving again and it has brought up all the abandonment issues all over again that her mom is leaving again. She needs help but refuses to see it. How do I help her see that therapy isn’t a bad thing. I love her unconditionally but I can’t keep up with the volatility of it. It manifests into huge fights and she lashes out at me. 2 days later she apologizes and says it is just those issues coming out in our marriage. Please help.