Just reading through your dilemma, and I just have a thought I wanted to share. If you write her a check every month to split expenses, why don't you just take $20 a month off until you get your $240 back? If you think about it, it is only $240 and is she going to turn around and take you back to court for that small of an amount? Probably not, and even if she does, all you would have to do is subpoena the bills and prove that she falsified the documents originally. I understand you don't want to go against the court order, and you do need to get it changed to reflect the $20 instead of the $40, but it wouldn't be something very difficult to prove in court that she lied about the amount you were supposed to pay.