Sirius jumped up as soon as he heard the sound of apparating, wand out and pointed before he even thought about it. War-times and Sirius was - already - used to fighting.

However, upon recognizing Regulus and the absence of a wand in his hand, just the newspaper, he lowered his own and stepped back, closer to Andromeda than his brother, though not quite close enough for her to hit him without moving first.

"Manners, Regulus."