Kathryn reveals that she has known all along that he was truly in love with Annette and manipulated him into giving up on the first person he ever loved, all because she threatened his reputation.
He was truly in love with Annette. This was what she has known all along. This is what Kathryn reveals. She has manipulated him into. This is what Kathryn reveals. She threatened his reputation. She was giving up on the first person. This is what Kathryn reveals. He ever loved the first person. She threatened his reputation.