The important thing is to stand up for yourself and don't take any **** from anyone.

I've done that too many times in the past and it only snowballs out of control. If it actually gets to the stage of really requiring legal help then it may be better just to quit even if you are behind. Depends how perverse you are feeling at the time. Sometimes its better for you and her just to cut your losses before it gets really stressful.

Going to court is probably the most stressful thing that the majority of people ever have to go through and its just not worth it, not even on principal.