"... Alright." He keeps his back to Jack, shoulders hunched in fear as he grips his skin tightly. Jack is going to be so mad at him. And he doesn't know what to do. He's afraid Jack will take his skin from him. Or put him back on the ship. Both. Or just kill him. He could put it back on but then Jack would wonder why his wish isn't being granted. The selkie couldn't get away. Or defend himself against a sword. He's just as trapped here as ever.
"You died?" He's not trying to distract Jack or anything. That doesn't seem like an option. But a statement like that is going to get some questions.