I am sorry about your loss....just grieve at your own pace. I am still grieving over my father who passed away almost 2 years ago.
On to your W. Sounds positive that things are much better between the pair of you. Remember...slow and steady. It took time for the M to fall apart and it will take MORE time to slowly piece it back together if you show consistent changes. She is looking for "evidence" of lasting and consistent changes. A lot of WASes are afraid of going back to the old R and that's what holds them back 99.9% of the time.