I don't think you are being over-bearing at all. I think you are making some generous decisions in paying off her bills. As you saw by her reaction to you not paying for the Mexico trip, it's never enough for a WW.

As far as your spreadsheet that shows the budget breakdown, don't expect her to stick by it. The WW doesn't honor much of anything, except strength.

She will try to use you to get as much as she can.....while she can.....knowing she is being unfaithful.

It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!