The right of first refusal is just something to point at and say we agreed to this. Truthfully anything in the divorce decree works that way. If my exh decided not to pay the support check I could get legal action but it would take some time to get something done about it. Basically it is the honor system. Mostly I just wanted to get it out there that I as my D's mother should have a chance to spend as much time with her as possible and not just drop her with a babysitter or girlfriend because it is easier. Same thing in reverse for him.