Welcome to the Forum JDL!!
Volume of alcohol isn't necessarily the benchmark, instead it's what behaviours or problems is alcohol causing in your wife's life, or in your relationship.
I woke up every morning and went to work without issue, but I was hiding my drinking, I was drinking alone, I lied and looked forward to when I could drink again, couldn't go a period of days without that alcohol . . . those behaviours were definitly not normal!!
You'll find loads of support here on SR!!