Lee notices — "Hey," she says, "I borrowed this dress —" But she doesn't stop kissing him so it comes out rather muffled. She does intend to keep drinking, actually, but leaving and doing that are diametrically opposed and it takes her a moment to consider this problem, glancing at the drink in her hand with furrowed brows.
"Mm," she says. "Mm-hmm." Lee doesn't know about him, but she's too drunk to navigate the train right now, and Michael's place is not within easy walking distance of a stop anyway.
Lee gets up to her feet, wobbly and constricted in her pink gown, and drinks the rest of what's in her glass in one go. That's not a mixed drink you're supposed to chug, but it's a long cab ride, she'll sober up before they get there. If they get there, because as she's tugging him out the door she keeps kissing his jaw and biting at his ears.