'til the end of the line

"Good," she says, her tone smug. "You're exhausting most of the time."

Her tone is fond, her hand on his arm gentle. She's making no effort to get up and take herself home, even though she thinks she might sooner or later. It isn't that she doesn't want to be here, but she isn't sure what Bucky expects, if he's waiting for her to leave, uncomfortable with sharing his space.

Something has changed tonight, she's just not sure the extent of it.