So, I'm going to start this off by saying, no my mom is not helping me with my wedding in any way. Which I'm 100% dandy with. It's been myself, fiance, and the future in laws that have been paying for everything, bulk of it being the in laws. So there hasn't been any issues with his parent's giving us a list of people they would like to invite to the wedding because it's honestly the very least we can do at this point.
But here's my issue, my mom has been seeing this guy for 5-ish months now. My fiance and I live about 6 hours away, and I finally met him in August because he paid for the trip to get my mom and younger sister to us and other family to celebrate my sister's birthday. Sweet gesture, and I didn't expect a whole lot from him since he was meeting us all for the first time. I didn't write him off or anything, I had nothing to validate that. Fast forward to a month, I'm back in DFW to watch my uncle marry the love of his life. I had driven my mom and sister to her boyfriends house and he drove us the last 15 minutes to the venue. My mom had spent the whole time wrapped up in him, and my sister. Pretty much pushing me, and the rest of the family we had came to see aside. Knowing her wasn't really surprising. It wasn't until we were heading back to his house to pick up my car to go back to my mom's that she mentioned to him that he needed to take time off for MY wedding coming up in March. As far as I'm aware we had not discussed this at all. I hadn't decided at this point if I would be inviting him, I was just waiting to see how it all played out up until December/January when we started sending out invites. She bounces around to different relationships very frequently and I don't want to have a rando that's only temporary there on our special day. She's taken away so many important parts of this planning process, including dress shopping. I'm emotionally exhausted and fed up. If she didn't have my sister I would've severed ties with this woman when I had moved out.
I'm extremely upset about this and now I don't want to have him there because she made the assumption that he was invited. I for one, do not know this man, let alone truly trust him around my little sister. To be frank, I'm angry about this. How would you go about it? I don't have a good relationship with her, and I don't know how to talk about this without it blowing up out of proportion. I'm very emotional and she manipulates that.
TLDR; emotionally distant manipulative mom invites her boyfriend of 5 months to my wedding she has not helped pay for or plan. How do I tell her he's not invited?