Child support is a pretty simple concept. If you break up with the parent of your child and they are the primary caretaker, then you need to help out financially. You helped make the kid, you help take care of it. But, as we saw on 'The Real Housewives of Atlanta' (Sun., 9PM ET on Bravo), some people just don't get it.
In the case of Bob, he struggled to comprehend why he needed to pay Sheree anything because she was doing okay financially. In his mind, because he provides a home for them when they're with him, his obligations are covered. This may be true if the kids lived with him 50% of the time.
Or if it wasn't Sheree providing most of their necessities like clothing and food. When she told him her next recourse was the courts, Bob said, "Do it." So she did -- throw water on him, that is.