Lancelot winces as she curses -- but he nods, if a touch unhappily still. If Nancy wants to leave then it is best to let her leave. Unhappy people don't make good party guests.

"All right then," he says, and hesitates before stepping closer. "Thank you for coming. Do you need a lift home?"

She's had a lot to drink, Lance will happily call her a taxi if need be.