She doesn't earn anything ... however her Sugar Daddy is doing quite well. He has his own business, she's sleeping with him and apparently he's happy with the situation (at least for the time being).
Again, my view is simple - If I sue, I have to show my loss and document what damages I have actually sustained. If I get child support - the amount is based upon the father's household income. I can spend that money in any manner I see fit. Clothes, cars, booze, vacations, drugs ... and the child is yet again the victim. Just because I get $'x' in child support, doesn't mean that the child ever realizes any of that money.
The system is badly broken.
News flash—if she makes nothing, you get child support based on imputed minimum wage, not any part of his income. And she will likely get credit for overnights and what non monetary support she provides, clothes, supplies etc.