MrsK said:
With the child living with the aunt, now would be the perfect time for dad to get CUSTODY and make sure the child gets the help he needs. It doesn't mean the child actually has to LIVE with him. It sounds like the child needs the help of a residential facility. If the NCP really does want to help the child, now would be the time to do it. Mom doesn't have to shoulder all the blame herself.
I totally agree with you, I was just thinking about this. If my husbands daughter was out of control like this & living with someone else, I think he'd get custody so he could put her somewhere to get HELP. His c/s money would be used wisely (for once) and the money her mom would have to send it could help cover the costs.
OP, try suggesting this to your husband.