Dude, I gotta warn you - it's no avail to work the wife, I was raised in a "divided house" - i am 53 years old now, it won't work. No way no how.
So hard so you can develope a great relationship with your son, take him places, be the FUN parent, when he is of the age to decide who he wants to live with - it WILL BE YOU! That will save him from this "kwap".
I dont' know where I read it but I like the quote someone made on here -
"Jehovah will not make you serve him, it's totally up to you, he doesn't force anyone...but he'll KILL YOU if you don't" How much sense does that make?
I feel your Puke reflex, deal with the little lad for a few more years, be his buddy, he will be yours forever! NEver talk bad about his mum, just be a great dad. You can do it .