Setting Boundaries for MLC Alien H

[In Limbo]

If anyone is reading tonight, I need some advice. Tonight H went to a formal party w/o me. When I got home from H7's ballgame, he was still here - which I did not expect and was unprepared for. Seeing him in a tux was very difficult b/c the last time I saw him in one was our wedding day 15 years ago. It was tense. Then I made what I think is a blunder. I noticed 3 beer bottles in the garbage can. Now, less than a month ago H got a DUI and hasn't been drinking since. Last night he had 2 beers and drove home. So when I saw the beer bottles, I said to him "did you drink 3 beers?" and asked him to please call me tonight if he didn't need to drive home. He got agitated and said he wasn't going to drink there and gave me a look. I have been doing so well not having the nagging/controlling behavior that he dislikes but I have a hard time not saying something when it's related to something as serious as DUI. I don't think I should apologize for what I said. In the future, should I just keep my mouth shut? My concern is that he's starting down that slippery slope of drinking again and it's going to go from 2 beers to 3 beers to 12+ and then driving. I know I can't make his decisions for him and a 180 would be to not say anything. But is that being an enabler?