Originally Posted by Mile High Mania
Sounds like a good move, but it's a situation that likely won't go away... at some point you'll need to address it in your own way with her and him as well.
This. And again, I would start having things at your house instead of your moms. Then the ball is in her court to come over or not, and you don't look like the bad guy if you don't get together. She isn't going to want to be denied seeing her kids and grandkids for to long IMO before she tosses the dude out.