She explains her intentions.

When Beth turned towards Amy again, the submissive girl noticed that something changed, but did not have time to figure it out in more detail.

"Amy. I'm sorry." — these words came out with considerable effort, but they made it easier for Beth to lay out the rest. — "I'm not who I posed as. I woke up there about an hour ago. I needed you to test if you can evacuate from the hall by activating a shelf like this one somehow."

"But, my Mistress..."

"I'm not anyone's Mistress. And I have no idea how to get your handcuffs or your collar off, there must be, like, millions of keys around here!"

Beth felt like she was about to break down, but Amy was first to shed her tears.

"I don't want them off, my Mistress! I only felt safe in this hostile place when you took care of me. And now you're trying to tell me that you're just like me!?"

"This is the truth." — Beth wasn't too shocked by Amy's speech. She just felt even more sorry for her.

"Then I don't want the truth. I wanna be your ****." — Amy knelt before Beth and lowered her head.

"Is it the voice in your head speaking or..."

"Both."

"Huh." — Beth stood in deep thought. The seal of indifference in her consience was broken. She cared. Whatever her dark mastermind side planned was not going to happen.