1)please note that consenusal s*x is not rape . if you had physical relations hsip with a man with consent it wont be rape .
2) if on other hand you had s*x with him and he had promised you marriage and backed out then you would have case .
3) now your partner has married you and is lving with you in rented accomodation . it is better you stay separate with your husband .
4)as far as your father in law is concerned it is upto him whether he wants to disown his son or not . no case of cheating is made out against father in law
5) if your husband subseqnely deserts you after marriage you are at liberty to seek maintenance from him . also you can ask for right to stay in shared household or seek alternative accomodation from husband under DV act
6) consult a marriage counsellor and try to save your marriage .