Fight with MIL need advice!

So, yesterday my mother in law and my husband and I were talking, out of no where she asks me if I’m pregnant. I said no and ask do I look like I am? And she said yes you do very seriously. That annoyed me and upset me. I’m very self conscious about my weight and its not her fault but that offended me. I walked away and my husband saw me tear up. He got upset with her and asked her to apologize. She comes up to me and apologizes but does it smiling kind of laughing almost about it. I didn’t think it was funny, I thought it was offensive. (It’s not the first time she makes rude comments about my weight) so this morning she called me asking me for a favor, this upset my husband even more. He told her “after you offend her and barely even apologize you want to ask for a favor, not ok”. She then calls me crying saying that she’s never going to ask me for anything again and for me not to ask her for anything. Pretty dramatic I think. I told her to calm down and that I’m not upset about what she said so much as how she laughed when she knew it hurt my feelings. She’s not understanding the point so I’m not sure what to do now.

Side note, she’s now lives with us (long story) and she’s sobbing crying saying that she’s going to move out cuz we don’t want her because she’s in the way.

She totally being dramatic and I don’t know what to do!!please help!

Living with her is not easy (I mean imagine having your MIL around all the time) but she doesn’t bother me I don’t want her to leave.

What should I do?