"I'm sure the others can handle Moscow until you see him awake and joking with your own eyes and ears." Maybe that would mean a little more work for the others, but having Kon go back before he knew Connor was truly okay would most likely only have the teenager distracted. The last thing anyone needed to deal with was a distracted super in a disaster zone.
Lois didn't let go of him, if anything she held onto him just a little tighter. She wasn't sure what else to say though and let the silence stretch about between them. Part of her knew that sometimes the quiet was a good thing, but she absolutely hated it, needed it filled up or she felt like she was going insane. The words were still taking their time to come and she sighed, wondering just how much worse everything was going to become in the next few days, weeks...however long it was until the end.