Ok so I recently found out that the legal father is not the biological father to my 16 1/2 year old daughter. We haven't had a "legal" paternity test done just an at home one. Everyone knows, and it's always been a possibility. but we have not done anything legal about it. My question is do I have to pay back all the child support my ex paid me over the last 15 years. When we broke up and went to child support court he didn't show up. So I have full custody, legal and physical. We also have another child that is in no doubt is his.

I was 17 when I had my daughter, I know that is no defense but what can I say I was young and dumb. He left us when she was 1 1/2, and our son was 1 month old. And has only seen them 2 times a year since(if that)