Even if he wasn't drunk, he probably wouldn't have heard Magnus without using a rune. His boyfriend is sneaky like that, which Alec might have muttered under his breath when he finally notices that someone was in the doorway. He knows that it had to be Magnus or someone that Alec could trust. The wards wouldn't let anyone else into the loft. The humming, which had been switching between classical pieces shifted to something from one of the Disney movies Clary had insisted they watch on movie night.

He gives Magnus a little wave, lifting his head up to smile at his boyfriend before getting comfortable again. "Yeah. Boring mission. The Clave isn't complaining and now you're home." He starts humming again, one of the Disney songs instead of classical, while trying to think of what he should be asking Magnus. "How's Cat?"