This mistress did not like what she had seen from her friend. Her friend had eyes for her man and she was not going to let her friend do that to her. So she lured her friend to her house and she tied her up after undressing her and she blindfolded her too before she punished her. It was a cruel punishment and she used her Russian roots to show her friend that it was not ok to go after her man.
These mistresses did not want their secrets getting out of the group so they ganged up against the loudmouth of the group and they taught her a lesson. They had planned it in advance and they had settled on trying some Russian femdom on her. It was cruel and painful but it was what she deserved as she changed after what they did to her and she was never a loudmouth again.