That is ALL I expect of her. She doesn't have to LIKE anything I do, but she does have to respect it. She doesn't have to like me either, but as DH's wife and the mother of her grandchildren, she DOES have to respect me. I don't like her, but I do respect her just because whether I like it or not she IS still DH's mother.
Now she will be calling the rest of the family crying and saying things like, "I just don't know what I did to make her mad this time. *sniff* Now she won't let me see my baby. *sniff*"
Because you know, making my child sick and calling her a bad word and telling her that what I say doesn't matter are no reason for me to get mad and keep Livvy home.