I have been engaged for two years and have an 11 week old baby. I would like to have a naming ceremony for the baby, as well as getting married when I lose the weight eventually. However, my mum (who I suspect to have NPD) and dad split up a few years ago and their divorce came through recently. Dad left her - in some ways understandably, as she can be a bully and is very unpredictable in her behaviour - and is now happily living with his new partner. Mum has made no effort to move on, and spends most of her time veering between self-pitying misery and rage aimed at either my dad's new partner or me and my sisters for the fact that we still speak to dad. Due to the unpredictable nature of her moods, I don't feel that I could invite her and my dad with his partner to either my wedding or the naming ceremony. I love my dad and don't want to not invite him, and I don't want to deeply offend my mum by making her the only one not invited, but I wouldn't enjoy any of it with the anxiety of having her there. AIBU to perhaps invite her to the naming ceremony (without dad) but not the wedding? Or is that just going to result in everyone being offended? What are my options? (First timer so be kind!)