Eventually, Severus will get the hell over it. Maybe. Eventually he'll sort of get over it. Even without the added ten years of his spirit being ground down into nothing but Dumbledore's agent, he's still grudging, unfair, and impossible to please. When faced with something legitimate like this, it's just that much more intense.

It's a lot nicer than his own message, when the charm glides off. ('Don't be stupid.')

They get to wait in awkward silence.

For a while.

"Fucking hell," Severus says after a length of no response and no return of the Patronus, angry. "That idiot."