Yuya goes back to drinking his tea while Strange has an internal epiphany, swallowing it all down in a few heavy sips. It probably looks like he's mulling over a response, but really he's just assumed it's to do with one of his other fae-summoning incidents.

He still thinks a letter is a little impersonal for an argument that resulted in lake-dunking, but maybe it's not as bad as it seems? "What did you fight about?"