Remus hadn't breathed in a little while, and he hadn't meant to be staring! He only noticed he had been when Sirius turned to give him a hand up, which he took and then nodded, bright pink face turning away. He cleared his throat and waited a moment for his heart to slow down to a more normal pace before answering Sirius.
"Uh. No." Though he knew he really should; after seeing Sirius, Remus particularly didn't want him seeing him practically naked. But. He couldn't go in fully dressed. That would just be... he would look like the bum he was when he got out, and that was never, under any circumstances, something he wanted Sirius to see. Better to turn him off completely than let him see--
"Thanks, I'll take care of it," Remus mumbled, taking a few steps and turning away from Sirius while his trembling fingers started working on the buttons of his dress shirt. "Go on in. I'll join you. You can warn me away from the sharp bits."