Nc for this as a bit of detail
Dps mum ( so not technically my mil but for the purpose of this thread that is what I will call her) is an alcoholic, and not a nice one.
Dp currently lives with her as we are saving up for a house. She is going to break him and im so worried. She's getting progressively worse since FIL died early last year. SIL lives miles away and refuses to deal with it. The whole family shove it under the rug and it's just a given that it doesn't get talked about.
When MIL drinks she is horrible, tells dp she wishes he had never been born, that she wishes he had died not his dad, that he's the reason she's miserable. He gets no support from her or the rest of his family to persue his passions yet his sister is the golden child. It's grinding him down and I don't know what, if anything, I can do to help.