This is a question about the Child Support Service in the UK Long story short, My ex lives with his new girlfriend and her 4 kids. They all see their dads so I'm gonna assume that she is receiving CSA payments for them. Now my ex is tighter than tight with his money and I know for a fact he hates the fact he has to pay for his children and will try his hardest not to pay for them if he could. Now hes moved in with her and all these kids will that affect the amount he pays me towards his two biological children? They are not married. They do not have any children together.