Ok, Im going to marry a wonderful who happens to have 4 kids by two Diff babies mama. The problem is I'm having second thought about marrying this man because I don't want to pay child support for any kids who's not mine.in addition I have children of my own! Can someone help me?

No, you will not have to pay child support for his children.

What he is required to pay, however, will obviously impact your marital finances. In other words you may end up, in effect, supporting him while he supports his children.