Future, I suggested what I did NOT to make trouble for your W but to perhaps help you avoid some *very* unpleasant proceedings.
Honestly, you seem like a nice guy but I think you are being very naive to what you could run up against. I am not saying you will run up against *anything* but in my experience, things don't get tied up in a neat and shiny bow no matter how much you hope or want them to.
It's not about making trouble. Only you can decide how you want to handle your W's affair. I am simply asking you to consider the fact that you have set a financial precedent in more ways than one that may come back to hurt you if you don't lay some legal framework soon. While this may not be the popular opinion, in this state a MC or a mediator (unless used in tandem with two attnys) just isn't the way to go.
I won't say anything more and I hope with all my heart things go really well for you.