Engine Room

Of course, Kaylee is in the Engine Room alone. That's where she spends all of her time. You teleport yourself to the kitchen though, and walk through the Serenity, making sure you know where the crew is. Inara is entertaining a client in her room (and from the sounds of it is enjoying herself quite well), Mal, Jayne and Zoe are all discussing the next job in the situation room, River appears to have cut herself and Simon is patching her up in the med bay, and of course Wash is flying the ship. None of them respond to you, and you even edit it so in addition to being invisible, they completely ignore anything that you do. You pick up a paper, make a paper airplane, and throw it at Mal, and it simply bops off his head without him acknowledging it. You also edit it slightly, so that Kayle is aware of what you do, but not you yourself. This will make things super interesting.

You finally make your way to the Engine Room. Kaylee is working away, adjusting the hyper drive, in a white tank top that's covered in grease. She's humming slightly to herself, and doesn't notice you enter the room. You can approach her, and admire her. Her boobs are accented by the tank top in a way that instantly get's you hard.