"Absolutely," he said at once, with genuine relief. "I'll be sure to come as soon as I possibly can - if you wait, like I've asked you." He would even risk being seen and walk her to the door, he decided; it was only across the street and a few storefronts down, and had the added advantage of being the opposite direction from his house. And unless something had gone terribly, terribly wrong, the potion ought to wear off in a matter of hours. If it didn't ... well, he would most certainly first to know, wouldn't he. "This way." He extended his hand across the street, as if to show the way, and started off.
And if he saw anyone he knew on the way home, he was bloody well Obliviating them, no questions asked.