grand parents...

ok so I'm a step parent of an amazing beautiful smart little girl. I treat her as my own... but any who... my mother in law is my step daughters bio grandma.

well here lately she has been treating me like shit. like out of the blue and its only when our daughter is around... when we tell our daughter no she over steps us and yells at us in front of our daughter. its really pissing me off.. her over stepping like that. she gas also said to me that she doesnt see me as a mother figure.. that she thinks I don't need to be trying to raise her.. like hello lady I'm here for good get the fuck over it. I'm to the point where I don't want anything to do with her. the mother in law not the child. Its like this woman cant live without drama I was brought up every different I don't do drama I'm to laid back to give a shit. But she is one of those where she pushes and pushes until you have to say something then shr plays it like YOU'RE the bad guy and she is the victim. she treats hubby the same way but of course that's his mom he is use to it. but im sick of her treating us like shit. any advice?