I was just curious if a father gets a paternity test for his kids, (or finds out through DNA testing that is so popular these days) and it turns out he is not their father - can he sue the mother for the return of all the child support that he paid her? 

My skids both got DNA tests for Christmas from Bm. Its surprised me because she cheated on their dad throughout their marriage. I always wondered if those kids were his. But I think that he would have to take the same brand DNA test to see if there is any relation, right?