Love how my child's grandma on her dad's side completely disregards anything I say and thinks just…

Love how my child's grandma on her dad's side completely disregards anything I say and thinks just because she has 4 kids she's always right and knows more and knows better than I do and disrespects (and breaks) the items I've purchased for my daughter and then plays dumb about how disrespectful and rude she is and my SO says nothing to her about it smh I'm trying so hard to continue a relationship with her for the sake of my child and for the sake of my relationship with my SO but idk how much more I can take especially since she wasn't even around or talking to me for 99.99% of my pregnancy