Drunks love a good debate which is surely not my intention with suggestion of removing alcohol from the home for now to start such on SR.
If your wife has the means and opportunity she will drink regardless of what you do with the booze. I have a tendency to think litigiously at times as well as for the "good" of all.
It would seem that for the good of your son's environment and for potential legal debates that you removing alcohol as a stop gap measure/trying to improve the family unit might be beneficial.
Bob, you have a lot on your plate and I will exit this here. I have tossed out from my heart what I would do, perhaps. I feel for all parties in this - especially your boy.
In a few weeks I will be 1 year sober - I did not hit a harsh bottom but prayed for release from God. Soon into sobriety He removed my obsession to drink and it has not returned. I drank for over 30 years. This made all the difference in the world in my case for myself and family.
I hope you find some peace
fly