Thor had no idea what his brother was up to, but that didn't particularly matter. Loki didn't usually go out of his way to make plans with him, so it was hard for him not to feel pleased at the arrival of his brother's invitation.

He raps his knuckles lightly against the door. Loki said before he could just come in whenever he was expected, but Thor was determined to respect Loki's boundaries, even when his boundaries weren't as broad as they once were.