I haven't really talked about this problem. She may have a drinking Problem (with a capital P). She tends to have at least one glass of wine or a beer every night. Sometimes, she'll have two glasses. It's when it gets over that threshhold that she has a problem. If she's over the threshhold, and she's mad at me, she can get pretty mean. If she's not mean at me, she can sometimes come up with a reason to be.
I expect she'll get very defensive and angry when I tell her that it is one of the subjects that we are going to discuss.