Truth be told, Skye didn't think Caroline would care if he knew about her involvement. And she didn't think he was really fooled about who had done this. That was fine, it wasn't a big secret. It was all just a part of letting him believe he had that chance with her. She needed him to believe that if they were going to learn all they could about whatever Garrett was up to.
She didn't even have to fake her amusement when he suggested she give up how she and Caroline had pulled off their decorating job. Skye just smirked at him and shook her head. "Hey, a girl can't reveal all her secrets," she teased him. "You might not like me as much if there wasn't any mystery. I will take those beers, though, and you can admit that you secretly like it a little."
Whether it did or didn't, it didn't matter. What mattered was that he thought she cared.