Just pretend like your mother in law  actually gave you a birth and your Father in Law is actually your own father. That is what i am seeing everyone do around me. Dont even remember to call your mother in mother's day but make sure you send a gift via Muncha to your mother in law. Also....welcome as much families and visiotrs from your wife's side to stay with you for indefinite period of time but never dare to ask your own parents to live with you and you wife.

Just keep those in mind and it will be really balanced.