It’s not over yet
Her nightmare was not over. She had to tell her husband immediately about what she read in Margaret’s cookbook. She knew that he would be the only person who could convince her to stop doing what she had been doing.
Bad mood
Lily could tell that her husband had a bad day when she got home. She realized only after that he hadn’t responded to her message. He could be spying on his wife. His parents could have seen her leave and called him to tell him about his “lunatic spouse”?