She's been sober for three days and refuses to speak.
She sits by the large window in the living toom, staring down at the traffic below. Sheldon appears mystified, eating while the other chatter on about how their days went; Penny seems to be the only one that notices any difference.
But, when she opens her mouth to question it, Leonard shoots her a look that says 'Don't Mention It'. So she doesn't, just grumbles into her food then half-enthusiastically talks about a man that made a scene in the restuarant today.
After awhile, Phoebe stands, wrapping her thin gray coat tighter around her body. All eyes turn to her but she doesn't glare like expected, she just stares for a moment then lets in a deep breath.
"I'm going...somewhere," she mutters, moving towards the door.
Eyes fall to Sheldon, who just stares after her with an almost...amused look on his face. Penny and Leonard exchanged a look then went back to their food.
"She's coming back," Sheldon says matter-of-factly.
"After she gets more alcohol," Howard mutters.
Sheldon shakes his head. "Nope, she promised no more drinking."
"Sheldon," Leonard sighs. "How do you know she didn't just go to get drunk?"
Sheldon looks up, eyes slightly widened. "Because she promised."
Leonard shook his head, fighting the typical urge to explain to Sheldon the instibility of an alcoholics promises.