Remus was laughing, almost doubled over at the sight and sound of his friend. He had missed this. It reminded him of easier days before the war and the Order. Back in Hogwarts when he, James, Sirius, and Peter would just sneak away from their Common Room to the Astronomy Tower or some such place and enjoy a little time alone. Just the thrill of breaking the rules.
"Careful, careful!" Remus caught Sirius before he could fall, but he couldn't hold on for long. He dragged them both to fall back on the couch, and Remus picked up with his not-quite-as great voice.
"And I need you more tonight! And I need you more than ever. And if you only keep holding me tight. We'll be holding on together! And we'll only be making it right."
He couldn't finish. He was tearing up with laughter, falling back and coughing. Maybe he just needed more to drink. "Oh man...if James could see us now...he'd likely be taking photos. Probably good he can't see us, then."