Jocasta Syndrome

Hi I am wanting help to deal with my mother-in-law who suffers from jocasta syndrome. My husband L.J. Vengatesh being a lawyer himself has desserted me and our 6 month old girl baby cause of his mother's sickness to d core. Can someone pls advice as to how i can get together with my husband in a legal way. I am wanting to live with my husband cause of our girl child who needs a secure future with both her parents. My husband has already abandoned his first child from his first marriage cause of his mother's sickness of jocasta syndrome. Pls help for my daughter's sake. Thank u.