So I emailed my FMIL yesterday and told her that the STD cards went out in the mail that afternoon. She responds back with, "Oh, that's great! I have one, possibly 3 more friends to add." <side eye> Oooookay, whatever. I advised her to ask my FI first since we're having a pretty small wedding (60 people) and to make sure its okay with him. He told her no, that he doesn't know the people she wants to invite and it wouldn't be appropriate since one of the couples is the attorney handling his child custody case with his ex-wife. So what does FMIL do? She sends a message to MY mom on Facebook and asks if she can add these people to the list. My mom didn't know that FI had said no, so she told FMIL that sure, she'd add them.
Now, I don't care about her adding more people. She's paying for the rehearsal dinner and an engagement party, so she can invite people. its going to be a hell of a party regardless. But to go behind her son's back like that after he's said no? Not cool.