It's probably just as well he's staring at the floor, because for a few moments, all she can do is sit there and look stricken. How can he live like this? Even if he didn't know what he was missing (and she feels a sharp pang of guilt as she realizes she's rather ruined that for him, if so), how does he do it? Can he eat and sleep with people like Booth on his tail all the time? What sort of terrible universe is this?

Greta gets up out of her chair without making any conscious decision to do so. A moment later, her hands close over his. "I'm sorry," she says, throat tightening. "I'm so--" she cuts herself off, pressing her lips together tightly. She is not going to start crying in front of him. She already regrets the damage she may have done with her questions and her sympathy; the last thing he needs is for her to get all weepy on his behalf.