Jealous mom!?

Donna • First time mom of a beautiful baby boy married to a handsome mechanic just turned 21!
Has anyone else seen problems rise between your mom and MIL. There is some bad blood between my mother and I but I still love her and want to give her a chance to be in babys life but she has told me that she is jealous of my husband's mom because it seems I have a closer bond to her. I spend more time with my mom then I do with his but still my mom knows she has messed up with me and hurt our relationship in a way that can't be forgotten. Is she being childish. Need some advice please.