Wife is a christian want separation converting child into a christian

I married to Christian lady In 2003nd blesing was done by church in 2011.i have 2yr 9month boy child leaving now with my wife at her Aunty home.I left her there out of my anger and now she not ready to come back.we wel living in our own home separate from my parents.now she says not loving me more and need separation out of court and I should not claim for my so .she want to convert him to Christian and all of this happens cos of her mothers interference who live in rented house near our home and wife was use to stay during our marriage life for whole day since 3yrs.guide me to get my son