She discovered that her micro bio-reactors can't process alcohol. And it went straight into her circulatory system. Once enough alcohol reached her Positronic Brain, it started to affect her in ways she had never considered.
She started losing control of the motors and servos that stabilize her balance and coordination. And, it started affecting her speech, judgement and impulse control.
After the last of the guests left, Bob found Weave sound asleep on the couch. He didn't want to disturb her, knowing that waking her now would disrupt her automatic decontamination process.
---------- This image is a continuation of 23 - Train. Their meeting in the city was to arrange their wedding. They had to fill out a lot of forms because Weave is an Artificial Lifeform. ----------