Unpopular opinion here! I recently got married, March 25, and there were a few people invited that I would rather not have been in attendance. However, the day went by so quickly and I was on cloud 9, that I did not even notice or really acknowledge their presence! I don’t know about your relationship with your mom, if it’s solid, etc. But if she’s actively involved in planning and you’re in a good place I would invite her asshole boyfriend. It’s her decision to be in a relationship with him and you do not have to support the relationship, however inviting him may keep your relationship with your mother on good terms and I’m sure that’s more than worth it. At the end of the day, it’s your wedding and you and your future spouse can do whatever you want! Happy planning! ♥️