AM is not even sure how to react at first. In his own life, there was one person he knew of who discovered what he had been doing (that is, before the police stumbled upon it), and so he ended up taking that man as his next victim of torture. He cut out his tongue and sewed his mouth shut as a symbolic torture, feeding him only through sticking a thin straw between the stitches.

Needless to say, that man eventually died from the prolonged torture and mutilation, but either way, that is what would set the precedent for what AM would do if anyone discovered him.

(It later turned out that one of his waitstaff had suspicions, but stayed silent until the police showed up.)

But the difference here is that Abigail is a fellow criminal. Of course, her crimes do not even approach the level of AM's, as far as he knows, and of course she seems terrified. But even so, he knows that this place isn't "real". He's already in prison. He'll return to his cell sooner or later, after all. So there's really little to no need to deliver the same treatment to Abigail. Not yet, at least.

"Did you now? Well, perhaps fate may have decided you take that turn." Not that he believes in 'fate'.

He steps out of the room and advances toward her, an unmistakable lust and hunger in his eyes. "Why don't you join me?"

But does he want her to join him as a victim, or as an abuser?