Kay had no reason to attend Michael's investiture as a Knight of St. Sebastian and his party, except to have a private audience with him. There she made her plea: "Let Anthony go."
Uh, how's that again? Anthony was in his late twenties at that time. He had finished college, had attended law school, and evidently had some serious vocal training. I can't imagine that he was living under Michael's roof, so he wasn't being held against his will. When Michael said, "Finish law school," Anthony replied, firmly: "No," and walked out. And, his feelings toward Michael obviously weren't warm, so I didn't detect any emotional bond (as there was twixt Michael and Mary).
So, what was Kay getting at?