I know how you feel. You know that my W's possible drinking problem has been discussed here a bit. I know how hard it would be to confront her in a real, family involved way, and how I would feel like it was somewhat counter to my efforts to release control over her and save my marriage.
I think you figured out last week that you almost have no choice if you think her health is in jeopardy. You think it is, and you took action. I think what you did was the most loving thing you could do and though it may very well have repercussions in your marriage, you put love and commitment to your W's health ahead of your personal and marital goals, something that was very hard to do. I know you agonized over that decision. I think you made the right one, all things considered and now, as you well know, you have to deal with the consequences of it, keeping close to your heart the thought that you did right by your W, no matter WHAT she thinks.
I hope this works out. I hope your W gets the help you think she needs and at the very least, it seems like you have the support of her family on this, so use that to your advantage. Lean on them if you have to.
In the end, we all made tough choices to get to where we are today. Sometimes they work out well, other times they do not. What we learn through all this is that we HAVE to make choices and live with their consequences.
I'm proud of you for doing that. May you have peace today.