any other mama's dealing with shit from their baby daddy's mom's? at what point is enough enough and…

any other mama's dealing with shit from their baby daddy's mom's? at what point is enough enough and when do I put my foot down and tell her off she is rude to both myself and my baby daddy and treats him like shit especially when it comes to his sister she acts like he isn't good enough and is rude to me and favors his sisters baby told me till I was 3 months that I was going to miscarry and then when we found out gender her response was good she can have alot of hamiedowns. she acts like my baby daddy and daughter are second best. when do I put my foot down and tell her she needs to straighten up before she enters my daughter life she tries to boss everyone around and I'm about to loose it help....