"Fine," Meredith says, lifting both hands in defeat, "if I'm what's making tonight difficult, I'll just go away. I'm sorry I asked." Turning on her heel, she walks out, headed for her office. Maybe she should just let it go — this isn't that, she knows that, this is making another problem — but this isn't nothing and she can't stick around to pretend it is, least of all if he's going to return her concern with that.