I have 50/50 with my ex for one child. I was paying her a full 20% but when time got a little hard she agreed to reduce it. She does not work but lives with her new husband and daughter. Why do I have to pay her any support? I provide the same amount of housing and food for him. She buys his clothes but with the money from child support. I also provide him with Health insurance. Would I have a good case to fight for no support?