I would try to keep up the appearance that its financially worse for her than you. That the kids would be better off with you and have more fun i.e. satelite/cable etc... when hers is overdue. Also never say I don't have any money this week etc!! To me its just makes the OM look like Mr. Money bags versus poor old you! Just a thought. You may not be able to do that, but I would try. Even if I had to take a small loan out or borrow from the parents or siblings....I would never allow the OM to think he is better!!
