I think that's a good e-mail, Fran. Not sure how long the alcoholism has been going on unaddressed by him, but that alone would be reason for me to do what I needed for my own -- and my kids' -- safety and happiness.
Make sure you MEAN it, tho -- and not just flexing the newfound muscles of power. I say that cuz I've had to gut-check myself on that several times recently. It can be REALLY intoxicating (sorry, bad pun) to suddenly have POWER, and the other person's undivided attention.