Thanatos is busy staring at the wall, wondering if he's going to be spending the entire trip with goddamn insomnia. He is almost about to leave and go back to the cabin's main area. Clearly, this isn't working, and he might as well do something instead of wallowing in frustration.

Then a weight shift the mattress. Maybe Thanatos can stay in it a bit longer. He turns over and snuggles his way into Zagreus's warmth.