My brother was divorced last year on the grounds of abandonment by his wife (she abandoned him and took his child 5 years ago) and he now has 17% of his pay deducted for child support for his son. She has lived in Florida for the past four years at which time she had another child with her lover. She is now threatening my brother with suing him for this child. They both entered and filed a settlement Agreement which details their divorce and child support terms. What are my brother's rights? Thank you?