Meddling

I am a married mother of 3 children. I have 3 siblings (one is older the other two are younger). Myself and my older sibling are constantly dealing with our meddling mother and her controlling ways. She insists on running our lives and telling us everything we should or should not do with our children, spouses, and everyday lives. When my mother is around and we are trying to discipline our children, she will interfere and try to take the child away saying we are being too mean. She tries to tell me how to wear my hair, how to treat my husband, where i should live, if i should or should not work, and every direction my life should take. The terrible part of her trying to control her grown children, is that she has 2 younger children who live with her. My younger siblings get everything they want, talk back, act out, curse, and get in trouble at school, but never hear a thing from mom. I cannot understand why she is trying to raise the adults and letting the children run wild.