My Sister In-law Creating Problems

My Sister In-law Who is separated from husband (Not Divorced) Hiding Her Marital Issues My In-laws and Husband Got Me Married in 2018. But after a year got to know her marriage is broken with in 4-5months of marriage in2015 itself as she was threatening her husband. 2021 Feb, Both my in-laws and sister in-law who resides in Hubli Shifted To Bangalore Along With Me and Husband By The Name Of Taking Care Of Our Daughter. Since, we both were working and corona situation my husband forced me to agree for them to stay with US. That started Manipulating, Creating Misunderstandings between me and my Husband Also Made US Seperate On Same House. Then they Started Teaching My Daughter to Call My Husband Sister As Her Mother. That Point I raised my voice not to teach. But they continued and my daughter started calling my Sister In-law as her mother and they never use to give my child to me. Now from last 10months I took a stand and Came out my house. If Sister in Law Stays With US I can't Stay coz my husband And She Is Having Very Mysterious Relationship and More Than ME He Want to Stay With Sister. He is telling I will leave you but not Sister. In this situation what I can Do?? They want to Take Away My Daughter so From Me.. But I can't Give My Daughter to Them.. Moreover My Husband Was Not Ready to Have Baby I forced him that I am getting old and we conceived a child now they only want cold now ME. Plz advice