What should I do?

My mom came to my house telling me to clean HER DIRT out of the tub with a sponge. Like why you can't clean your own dirt out of the tub? I really do want to cut her off because every time I refused to do what she says, she start cussing me out in my house... I'm ready to cut her off. She doesn't do any of this towards my siblings. they called her b**** and h** before and SHE  IS STILL TALKING TO THEM! most times Im minding my  own business.  she'll come out of nowhere shouting to me, "I hope you d** B***. Even my grandma once told me,  I didn't like me when I was 7! My family are NUTS! What should I do?