I tend to agree with LH here. When did you tell her you would fix it? If it was before BD or before you knew about OM then I would definitely not do it. Her actions ended the relationship and left you as a boarder. Everything is different now.

Even if it was later, I would think about it a lot and why you feel the need to do it. Is it an attempt to be nice? I can understand the value of honoring your word, but only up to a point. People are allowed to change their minds as well. I don't see that as vindictive necessarily. If we are supposed to treat the WAS as a friendly cashier, I wouldn't repair a cashier's house and pay for it myself.

W 34 Me 42
Married 7 years together 8
0 kids 1 beloved dog
BD 4/6/2018
I moved out 4/7/2018
I moved back in alone 8/05/2018
I file 3/06/2019
D official 5/7/2019