In response Rey...

Mimics her mimic.

Rey slowly but surely spreads her legs similar to her shadow self, while she now starts to stare at either her mimics eyes or her mimics slit. This continues for a minute until her mimic raises her arms so now she was in a X position, and again Rey copied her movements ever so slowly.

'Why can't I help but follow her movements?' Rey thought.

"Good, very good, you're learning, the first step to true power, is to watch, and learn." Shadow-Rey told her, with an emphasis on the watch.

Shadow-Rey kept that pose as Rey continued to stare, blushing madly, with the signs of sweat on her body growing. On the other hand, her shadow self was devoid of rosy cheeks, and was completely dry with no sweat whatsoever.

"I can't understand how anyone, much less ME, or at least another version of me, could stand being naked in front of someone else, and not have the slightest bit of embarrassment!" Rey exclaimed, as she began to shake in the position she was in, both due to shame and, something Rey can't find a word for. Not yet at least.

"Continue to follow, learn, and obey, then you'll know everything you need to know, everything you truly desire to know, and everything that no Sith, of Jedi could ever teach you." Shadow-Rey responded.

After her response, she moved her hands so they were behind her head, she kneels down, with legs still spread, and bows her head with her eyes closed.

Now that she wasn't looking, Rey could possibly get the jump on her, or she could make a dash for the exit behind her, even though, unbeknownst to Rey, it was covered some time ago...