Iris is a liar
In her mind, she was an excellent wife who was always there for her husband. She had a bad feeling about this. She couldn’t bear the loneliness of sleeping alone for so many nights. Initially, she feared that this would hurt their relationship.
She did an excellent job in the performance. However, she was not able to outsmart him for a long period. She can’t be that careless. Thomas was not going to pardon her for what she had done.