Okay so I need someone to either tell me I’m mental or agree and reassure me so be brutally honest 😂

So my partner and I have had the wedding chats, the baby chats etc and I always joked and said his mum can’t be a part of it but now we’re engaged we actually need to talk about it seriously....

his mum has manipulated him, treats him and his disabled brother terribly and is rude, makes comments about me and I just can’t get past it- I’ve tried forgiving her and moving on several times, we have both asked her if she has a problem to which she says no but then carry’s on with her behaviour and makes no effort with me or her sons! His sister is now doing the same and honestly it’s made me doubt myself and our relationship in the past- do I exclude them for my own happiness (but risk making him unhappy/ isolated) or do I walk away and let him find someone that he can have both his family and a relationship?

Help!!!