Can I also add that after feeling very bleak at times, I have posted today about my partner agreeing to going to a rehab facility soon so there is hope for you and your family. That is a massive step up from where he was this time last year.
He has been attending a local drugs and alcohol service since last year and it has helped (obviously he had to agree to this)
If you’ve got spare money, as you imply, maybe your wife could get better treatment and eventually a good rehab?
Also, I don’t think it sounds like you’re exaggerating as hiding alcohol in a child’s room or in a water bottle is not the behaviour of a ‘normal drinker’