The only time I released a collared slave she didn't want it, it was bluntly an in-role way to dump her. She had been breaking promises and dodging commitments, and when she called to say, yet again, that she wasn't coming over when she had said she would, I read her a speech which came down to, as of now you are no longer my slave. It hurt her, I knew it would, but it was a recognition of what was really happening.