The decision to come to Grace's hotel seemed like continuing a habit that was too addicting to quit in Matt's book. Close to three weeks into seeing her again, he was more than ready to go back to the old familiars, which would eventually lead to a fight again. But after tonight, with her actually stopping by the shop and visiting, well--it would be rude not to follow up her visitation with one of his own.
For Karl, even thought it was close to dawn, night or day, it didn't make a difference for him. Built like the machines his existence was intertwined with, his body didn't recognize the difference and he was just lucky that his undercover-self was used to being up at long hours at a time. Simply a life of someone with no set future or plans.
Once the door was opened, Matt spent a moment silent, leaning against the door frame, taking in the view from above. A rather nice view, too.
Karl was just trying hard not to turn around and apologize for intruding, not to mention give Alyssa some time to put on more clothes.