Horvath turns away a moment, eyes closed, assuming that since Balthazar and his apprentice are having a moment, he can take one of his own to fight down the surge of irrational jealousy that comes at Dave's words. It's a dangerous emotion, capable of eating a man alive until he's only a shell... something he suspects of his alternate, at any rate.

"Perhaps..." Horvath keeps his tone carefully controlled, patient and guiding for Balthazar's sake as much as the boy's. "You should lock the door to any further customers, and we should all sit down in the back room..." There's tea there, after all, and a chance to rest his leg, and the setting might calm all three of them down a little.