Child Support Demand for a Child the Father Didn't Know About

A man in Florida has been married for eight years, and has a child with his spouse. They are struggling financially. The man just received a notice that a woman claims that he is the father of her 12-year-old son, and wants him to pay child support. Can the man be ordered to pay child support for a child the mother hid from him for years?

Without regard to why he did not know about the child, if a DNA test confirms his paternity he may be ordered to pay child support.