You said she's working, so there will be alimony. Her income will be considered in any child support arrangements as well. Your dude should be proactive and get the ball rolling on the divorce, so he can maintain as much control ass possible. He will probably be ordered to pay less than he is paying now.
Thats the fukked up part yo. The shyt financially cripples him to a point where he's struggling to get the money together to get the ball rolling on the divorce.
A lot of these cats in here talking shyt like things like this can happen to and dont concern them. Keep thinking that.