Ex husband, new baby daddy drama?

Me and my ex husband have 3 kids together 2 boys one girl. We both split up mutually because we just didn't love each other as spouses ( arranged marriage, we tried and tried ) but we was always bestfriends. ALWAY.

He's an amazing father, him and his new wife and BOTH amazing parent to our children.

Now here's the issue.

I was with another man, we became pregnant ( I'm 30 weeks tomorrow) this man doesn't want ANYTHING to do with the pregnancy. He doesn't want the baby nor does he want any legal right to the baby.

My husband, and his wife offered to treat this child no different than our child. Take him on weekends, provide for him, pay child support for him. Etc.

Since they found out they gave me an extra 200 a month ( on top of the 1200 they pay me for the children, theirs no support order they just do it ) they bought me clothes for the baby, a new carseat etc.

His wife is truly a blessing, and her and my ex are amazing people.

What would you do, allow ex husband and his wife to coparent with me ? Or force baby daddy with child support and court?

Sorry, English is not first language I'm sorry for my mistakes.

Morgan: My ex and his wife won't take no for an answer, they want to give me money for the baby and make sure the baby is provided for. I'm not asking them for the money, they want to give it to me. They are very nice people. His wife has been apart of our coparenting situation for 9 years now. She's as much as a parent to our kids as I am. She got with my husband when my sons was 2 and my daughter was 3. We do Christmas together we take the children to park together. They don't have any children as my husbands wife had her uterus removed for cancer. She gets me a birthday gift/mothers day gift every year shes never over stepped and calls and checks up on our children as much as their dad. Me and my ex husband aren't bad blood, we just was forced to marry at a young age without knowing each other that well when we moved to new country we got our freedom and realised we aren't husband and wife rather than bestfriends. I love my ex husband and his wife dearly, I guess we're big weird family.