for 9 months, on the WEEKENDS, she could appear to have her drinking under control. i'm sure there are times when that 1 or 2 was maybe 3 or 4, unless you kept a chart. however AT THE SAME TIME, she was also drinking to excess, you just weren't present.
and then suddenly those "sort of, mostly sober weekends" with you got less fun, and her desire to drink to abandon took over. or it seemed like it happened over night, altho i'm sure there was some progression you probably didn't notice.
so at no time was she NOT drinking, she was ALWAYS drinking, to one level or another. that was her coping mechanism, her go to, her habit.
she has not claimed or pledged to STOP drinking, she just claims that she won't let alcohol be in charge. and please come back. you'd be going right back into the alligator swamp.