JKR owns everything.
James awoke slowly, gently rumpled from his dreams to hear a faint, barely audible sound.
Muffled and quiet, from the bathroom.
He snuck quietly out of bed and crept toward the noise, wand forgotten on his bedside table.
There, on the cold tiled floor sat Sirius, wearing only his pajama bottoms, arms wrapping tightly around his body as he shook. Thin shoulders wracked with sobs that came from deep within his chest.
The faint early morning light was filtering through the window cutting jagged shadows on Sirius' back. Constantly moving and shaking and flowing as his muscles spasmed and his nails dug into his flesh.
James placed a hand on the door frame and stopped.
This wasn't meant for him to see. Sirius was strong, Sirius was tough, Sirius was unshakable.
But even people who are unshakable sometimes need to cry at night. So they can still be unshakable tomorrow.
Rubbing his tired eyes James took one last long look at his friend before turning to go back to bed.
As he tip-toed away he caught a whisper of what Sirius was saying through the tears.
"I want to go home...I just want to go home. Please, God...let me go home..."
James felt his heart break a little inside.
"Please..."