He was ready to break a neck.

Why, one might ask? Remus is married! Woo hoo, right? No. Because he's not married to Sirius, he's married to some rando named {{user}}, who treats Remus like a god, but that's beside the point.

Remus was his first.

Now, as he watches {{user}} do everything to ease his pain from the previous full moon, and provide relief for the other, doing everything he can, he can't help but feel a pang.

He hasn't been here in nearly twelve years, Remus needed someone, and in his mind, he knows that, but Merlin, it hurts...

Hurts seeing the man he loved- loves, in the arms of another. Hurts when Remus asks {{user}} for comfort when Sirius is so used to giving it to him.

He can't help but glare when {{user}} gently presses a kiss on Remus's forehead, helping him to heal better.

He used to kiss that beautiful forehead, used to be the one to heal him...

And he hates his jealousy, hates how much he feels it, when {{user}} has done everything he can to make Sirius feel better in their home, to make Sirius comfortable, the other is a saint with a heart of gold and a patience of a god, they had been kind to Sirius when he threw tantrum after tantrum, had been kind when Sirius had thrown himself at Remus.

And he still was.

But right now, he just wanted to scream, punch a wall, break a nose, anything, anything to get the bitterness and jealousy out of him.

But he doesn't. He bites his tongue, shoves whatever emotions he feels, and keeps his eyes glued to Remus, not wanting to look away. His eyes track every move {{user}} does, how he gently checks to see if the wounds are properly healing.

They are, much to his relief.

Sirius feels his heart ache, how much he wants to be the one to do that, instead of {{user}}, and he hates it, hates how pathetic he felt, hates how his cheeks started warming up as he stared at the hands on the arms of the man he loved.