Jenny, one of the spa masseuses.

The intruder was a small young woman, only a few years older than Michael at the most. The woman was short and skinny, with the build of a gymnast, and she was wearing her dirty blonde hair up in a bun. She was dressed in black and white, much like all the members of the staff on board the Excelsior. Her uniform, though, was different than the ones that Michael had seen before-- he didn't recognize it, much less her. Based on the look on her face, she didn't recognize him, either.

Michael's heart stopped. Had she realized what he had been doing when she barged in? If she had, would he get in trouble for jerking off in the tubs? He certainly looked guilty now, and the look on his face had probably given him away the moment that this woman had stepped into the room. Now he just had to pray that she hadn't been paying enough attention to figure out what he had been doing only a few seconds earlier.

"Oh, shit," the woman said, turning her eyes away from where Michael was sitting in the tub. "I'm sorry, I-- uh, never mind." Her voice was trembling, and she had gone bright red. Clearly she hadn't been expecting to find Michael there, and who would have? It was after midnight and the spa was practically empty. Or, at the very least, it should have been empty. Michael still wasn't sure that his sister's friends' plan to hang out in the spa in the middle of the night was technically allowed.

Then again, this strange woman had just caught him beating his meat in the hot tub, so... who was he to judge?