He realizes too late that his comment could have been interpreted in more than one way and oops. Apparently, his tact is really out of practice after being stuck in a pit for a month. He's typically more observant than that.

But he shifts slightly on his chair and reaches out for the frame with a crooked grin. "I think I can manage that much, at least. I'll feel guilty if I just sit here and talk at you while you work. Mags putting you to work, I take it?"