My child is 16 years old. She's never met her father and he never wanted to see her. He was ordered to pay child support when she was 12, he only paid for a couple of months then he went to jail and child support stopped. He is out of jail and wants to get the support decreased because he's not making a lot. He owes 20,000 in back child support. My daughter wants to live with him. If I send her to live with him will I have to pay him child support and would he still owe me back child support?