You never expected your house maid would find your key and then blackmail you to stay her little toy when she caught you wearing your cage and took some photos. If you fired her, she would just release the embarrassing photos.
When your partner suggested you try some bondage to spice things up, you never imaged it would start with 3 weeks of chastity followed by a shibari session ending in free use for all your partner's friends.
The cage had been locked on for months now, you could no longer take it and started signing up on message boards for anonymous meetings in public. You hoped they would give you pleasure and let you cum, but more often than not, you were just a play thing