Karl winced, since a part of him had hoped that she couldn't have heard it over the shower or uh, whatever she was doing in there. (Focus, Karl, focus.)
"Yeah, I'm good," he mumbled back, trying his best to make it heard. "Nothing, I was just checking. It's been a long night and everything and you're in there for some time. So."
Why it was so hard to just put thoughts into words and then into sounds was beyond the god of Industrial Warfare, who had provided the materials needed to win both World Wars and so much more beyond this little undercover scheme. After all, it was just his partner possibly naked on the other side of the door and he could still keep things professional despite that as well as the noises going on in the background.
"I'm going back to sleep. Over there." Karl didn't wait for a response when he went back to the bed once more, taking up the same pillows, despite the fact that the "ear muff" method had failed before.