"Sorry, what?" Matthew blinked quickly, then, almost as if the rapid-fire movement of his eyelids had powered up his brain again, he smiled again, briefly and apologetically, and said, "Yes, of course! Come in, come in!" He removed his hand from Stephen's shoulder, rather reluctantly it seemed, and made a deferential gesture with that hand, inviting Stephen to pass him, that he could reset the locks upon the door.
This accomplished, Matthew relaxed somewhat, though he really hadn't realised how tense he had been -- standing outside on his front step, conversing with a "Muggle;" why, someone might mistake him for suicidal! Which he definitely was not.
And why not? said the little voice in his head, which he tried to ignore, though it seemed to fill his head, to the detriment of his own sense of hearing, if Stephen actually said anything else! You know you're already damned for killing other people; why not finish yourself off? You'd be doing everyone a FAVOUR, really! Maybe even God would forgive you for that exit...!