Until that moment, Remus didn't know about that bit of what happened. He had know idea that Regulus had informed Mrs. Black about Sirius being gay. He knew something had happened to make her believe that, but he had no idea that this was what it was. A long low growl was made in his throat, and he swore that he could feel the vocal cords twisting to force sounds that no human organ could utter. He growled again, and the hairs on his neck stood and got longer before he moved between Sirius and his brother.
The nails on his hand had darkened and thickened, and they were made to tear and to shred flesh and bone. His nostrils were pulsing as he stuck his face near Regulus's smelling the blood and the sweat and the fear. Oh... how good the fear was. He opened his mouth, the tongue resting against the fullness of his lips before he touched the claw to his lover's brother's face. “If you don't hurry, I'll eat you.” His blue eyes seemed to glow as the pupils dilated a bit, gold mingling with the depths.