Lady Shay had noticed that her husband was being influenced negatively by his friends and she was concerned that if she did not do something urgently, she would lose him and that their marriage would break down. So she went to the friend responsible for it all and she made him eat her shit for him to stop being a negative influence on her man. He was shocked and degraded but he stopped.
When lady Shay noticed that this guy was immature, she knew that she had nothing much to do with him and that she wanted him to learn to be mature. She did not want to deal with him anymore until he matured up. So she used her shit to send a message to him and to make him realize that the train had left the station and he had no choice but to catch up.