Like he's got a choice !
Well, he did originally ... all of these poor victims at some point in time said, "yes, click that lock shut" and after that ... well, they had their chance!
This pretty gal has certainly taken to being a keyholder after one night of controlling her new slave. He'll be listening to her amused and taunting comments for quite a while. Wonder what state he'll be in if he gets passed to the next sister and serves all that time, too. I can picture him being reduced to a blubbering desperate wreck.
I love this girl's smile. She seems so sweetly content at what is about to happen.