You know, I NEVER reply to posts like this, for lots of reasons. I really want to echo, however, the very few comments that are relating not to your MIL, but to your husband.

I assume you consider yourself (mostly) happily married. Yet it really sounds as though there is a larger issue here--your relationship with your husband. If you and your feelings are not his priority, there is a bigger problem that won't be solved regardless of how you handle the MIL situation. Once this has played out--one way or another--you need to have a conversation about that. It is never an easy one to have, but it will probably be more productive if you're not feeling hurt and he isn't feeling defensive. I wish you the best.