Yes, I'm of the same mindset as Hawkeye, that alcohol is somewhere and it's not down the sink, I wouldn't believe it for a minute (but hey, that's just my opinion).
You mention he hasn't had a drink since xmas, how do you know this when you were away?
I read a lot in the newcomers forum and the disbelief that they will never be able to have "a glass of wine with dinner" is a common theme in many threads. I have never seen a thread where it said - I'm here to tell you I tried to moderate and it is working just fine!! Not once.
You on the other hand sound strong and you will get through this.
Sorry to hear your mom is having health problems, hopefully it's something simple they can take care of and she will be feeling good again soon.