He moves so quickly it's confusing. Makes Sirius wonder if maybe he's fallen asleep in between sentences. He hopes not. He doesn't want to miss a moment of having his brother really back.

Which is why he can't help the slight frown when Regulus backs away, "'ll right. Come back soon, okay? I love you, too."

And then his brother is gone, and Sirius is still trying to process the speediness of it all.