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.
What planet has this?
http://abcnews.go.com/Entertainment/story?id=116352&page=1
Let's look at Mick Jagger to just disprove your statement. That's somewhere between $5-35K/month to a fling with a model. That number is based on Jagger's net worth - it has nothing to do with any missed income his booty-call earned either in the past, or the future. The judge has determined that the child is ENTITLED to some percentage of Jagger's net worth.
That's not the case in either Texas or Washington state, either. The child support payments are calculated on the father's HOUSEHOLD income (after taxes, but before bills). For example, say he re-marries (as in the case with my daughter); she is paying a portion of her income, to his ex-wife for child support; despite the fact that his ex-wife is remarried into a family that is considerably wealthier than her family. The child-support is based upon the HOUSEHOLD income. If either of them were to get an increase in their income; his ex-wife would then sue for more childsupport. The Ex-wife has filed to increase childsupport twice in the past 12 years, and each time the judge has ordered tax records for the father, and my daughter to be considered. And yes, the child support payments went up both times.