Monster-in-law

I'm going nuts! We had a house fire we me and my husband are having to stay with his parents! This woman is nuts! She won't let me have kids even tho we are still trying anyways lol. And when my step daughter is around the woman will let her have pop at 9am even after I say no! This is a battle I can't win! I mean the woman sweeps her floors 8 times a day! And she will vacuum at 6 am to wake is all up she had to have complete control of everything that happens in our lives and acts like my step daughters mom so my husband had no authority over his own child what can I do I need help! She is ruining our marriage and I'm getting very close to just throwing in the towel on the whole this and just say fuck it! Please help