Let him worry about what's fair for him and you worry about what's fair for you and the kids. It sounds like he has been pretty stand-up about this so far.
Seems like having an appt with an attorney would be the way to go at least for general information.
Me 57/H 58 M36 S 2.5yrs R 12/13
Let me give up the need to know why things happen as they do. I will never know and constant wondering is constant suffering. Caroline Myss