aw darling

thats not very nice at all!
maybe you are invited because you and your boyfriend are together and having a child so she must think that maybe you would automatically come, i dunno. Just trying to find something, cause that may be the answer.
If they seemed happy about it then, then they should still be happy about it now. Dont be depressed over it hun, it will be okay.
If not, talk to your boyfriends mum about it, sit her down and ask her whats going on. It may be confronting BUT its what you need to do. And also confront her about your boyfriends EX girlfriend. That isnt very nice to invite her. Its kinda mean.
i hope everything is okay
xx