A woman that I was dating almost five years ago has just applied for child support with the Texas AG. I have been married for 4 1/2 years and have 2 children with my wife. I pay child support for my 9 year old from a previous marriage. The woman in question has since been married and divorced. Her ex-husband (whom she was not married to at the time of conception) signed both the paternity papers and the birth certificate for the child. What should happen next? Can they use per diem payments and a vehicle allowance to calculate CS?