Me and my fiance just recently found out that his ex has a one-year-old. She claims it is his, although he never knew about it and if he had, I know it's sounds bad, but they wouldn't have went through with the pregnancy. Obviously if tests prove that the child is his, he will be obligated to pay child support. My question, is there any way around it, and will we have to pay her more because we will be married, or does the percentage only come from his income?