When you forget about her
I once tied a girl like this and planned to torture her with abandonment only for a few minutes, but I've honestly forgotten about her.
The peace and quiet is intoxicating. So I went for a short walk, coffee, read a book.
I came back after, what I think, was three hours. She is crying, drooling all over herself, a hint of piss in the air.
I just bent her sideways and fucked her. Finished inside of her and went away again to take shower. Came back after few minutes with a towel to just hear her whimpering. Untied her, thrown her the towel and asked what is for dinner.
Never again have I heard even a hint of disobedience.