Good for you!!!
I'm sure OT will hop on here eventually and disagree with your actions and tell you that you are enabling her drinking but that is not the way I see it.

1. Yes, your wife may or may not have a drinking problem BUT it is her problem. The more you tell her that she has a problem the more she will resent you and rebel like a teenager.

2. She probably dreaded getting up because then she would have to face your anger. You really broke the cycle when you called her to see if she would like your company. That is great!!

The way I see it, is you have to put yourself in their shoes sometimes and I know for a fact that I would hate to be grilled and chastised for every little thing that I did. No one wants to be treated that way. You treated your W with love and compassion, three cheers to you!