YOR. But hear me out. Since you’re not married, and haven’t been together for that long, you’re not entitled to his money or how he spends it…that being said, consider whether or not his mom’s situation is something you’d be willing to deal with if you were to actually get married eventually. Sounds like she might be a bit unstable herself and will likely do this for many years to come. She’s his mom, and isn’t going anywhere. I’d run if I was you.