My FI and I are getting married next year, and we've decided on a very small, close friends and family wedding. Both of us have various family dramas (ie divorced parents who hate hate hate each other; aunt and uncle who don't speak; etc) but we're going to be inviting everyone and trusting that people will be respectful enough to not use our wedding as an opportunity to rehash old conflicts.
To make a long story short, my brother is in an abusive relationship and his wife has cut him off from most of his friends and family. As a result, my mom and I have never met my two nephews and we haven't seen my brother in over 2 years. The only person in his family he is allowed to have contact with is my dad. My brother's wife has an obsessive hatred for my mother and I, despite the fact that we tried really hard to make her feel welcome as part of the family. She has manipulated the fact that my mom and dad don't speak to further poison my dad and brother against my mom and to create a rift between my dad and I. Amongst her other hijinks, she has faked cancer for sympathy, and to top things off, she has a history with white supremacist organizations. Basically, she's a sociopath who has caused a crazy amount of suffering in my family. My brother and I have always been really close, as he was with my mom, and it's been absolutely horrible losing him - not to mention a relationship with his kids - this way.
After my daughter was born this year, my brother started to text me and we've been in a bit of contact. I want to invite him to the wedding, but I totally cannot deal with the thought of his wife being there. She's a loose cannon who's threatened physical violence in the past (and who's physically abusive with my brother) and I have doubts that she would be able to attend without causing major drama. I know that she might not even show up, but I'm scared to risk it. All the same, I really want my brother there. I know it's wrong not to invite both sides of a couple - and that she probably won't let my brother go whether I invite her or not - but I want my brother to know that he's wanted there without risking this evil cray cray showing up at my wedding. What do I do???