Estimated Child Support For Two Kids

Yes my ex wife found out i had a new girlfriend and now she wants to take me to court to pay childsupport for my two kids even though i see my kids everyday and i have reciepts where i pay for anything they need. my ex is a police officer and she said she would make sure i dont have a penny after she takes me to court.

She said if i cant be with her that she would make sure i wasnt with anyone else. can she sue me for everything i have? and if not about how much childsupport do you think i would pay if i bring home $560 a week?