He squeezed a hand on her shoulder in a gesture of thanks.
"I appreciate it. Tea in the afternoon will be great. Honestly, if you really want to check in you can, but you'll likely find me asleep and I have on good authority from Sirius that watching me sleep is very dull work."
Seeing the concern on her face he added,
"I'll owl if I need anything, I promise. I've done this many times before, so don't worry yourself about it. Have a good rest of your day."
And with that, he left her and exited the shop via the Floo connection, emerging back in his flat where he gratefully shed his cloak and took a long, hot shower in preparation for the night to come.