Jack agreeing that despite her enthusiasm, Tosh shouldn't jump RIGHT back into work, John has instead offered to take her for a stroll and a bite. John isn't sure where this feeling of being responsible (is this what that feels like?) for Tosh came from. Yeah, he got her killed, but he brought her back! As far as he is concerned, that cancels out the first half. All fixed. But still, he did go through the effort of going to get her, so maybe that's why he feels somewhat...attached. It's nothing more. He doesn't get close, not really, not anymore. But he is enjoying her company. "Feel good to be home, then?"
He spots a figure in the distance, and squints, then shakes his head. Nah.