My MIL is super overbearing in general (DH is an only child

), but ever since my twins were born six weeks ago she is on over drive!!! She calls every day... Sometimes twice a day! I can deal with that and most the time, as terrible as it sounds, I just ignore her calls. But one thing she has been doing that I can not ignore. I have caught her referring to herself as 'mama' when talking to my babies... Weird and completely inappropriate right? My husband seems to think I am blowing it out of proportion but I am totally disgusted that she refers to herself that way. I also must say I don't think it's purposeful, she does correct herself from time to time... But really... I am the mama lady!!! Suggestions on how to gently address this with her?? Otherwise I may pop my cork next time she does it.
Re: MIL issues