only suggestion i have is to add some sort of enemy that can grab and drag the player somewhere/ make the bondage stricter. something like that.
Reading these failstate suggestions, made me think. What if we could select an on/off option where if she fails to escape after a certain amount of time, she's captured again and placed in an inescapable situation, perhaps chairtied and stashed in one of the rooms. No knife to reach, no escape, just struggling in the ropes.