Madame Merle stays at Mrs. Touchett’s and plays the piano, charming Isabel.
Madame Merle asks Isabel select stories about her life and they become close friends.
The older woman leaves to visit other friends before Mr. Touchett dies – she’s a very, very popular woman.
After Mr. Touchett’s death, Madame Merle reveals her nasty side; we hear her inner monologue regarding her supposed friend, Mrs. Touchett, and it’s not so nice.
Madame Merle visits Osmond and the newly returned Pansy in Florence. She tells Osmond about Isabel Archer.
With Isabel in mind, Madame Merle visits Mrs. Touchett’s house, Palazzo Crescentini, in Florence.
Madame Merle introduces Osmond to Isabel.
Madame Merle walks with Countess Gemini outside of Osmond’s home in Florence.
Madame Merle thinks that Isabel is falling in love with Osmond.
Madame Merle plays dumb when Mrs. Touchett brings up Osmond’s interest in Isabel. Madame Merle convinces Mrs. Touchett not to say a word to Isabel or Osmond, claiming that she’ll take care of it.
Madame Merle travels with Isabel to Turkey, Egypt, and Greece.
During the first couple years of Isabel and Osmond’s marriage, Madame Merle stays out of the way.
Madame Merle knows about Rosier’s love for Pansy, but doesn’t approve of him for her daughter. Still, she offers to "help" him – for whatever reason, he, like everyone else, trusts her.
Madame Merle convinces Rosier to only call on Thursdays at the Osmond residence, and not to do anything rash.
Madame Merle visits the Osmonds. She’s thrilled by the prospect of Pansy and Lord Warburton’s marriage, and thanks Isabel tenderly for making it possible.
Madame Merle goes to Naples and Rome.
When Pansy’s relationship with Lord Warburton ends abruptly, Madame Merle confronts Isabel and menacingly declares that she has everything to do with Isabel’s life with Osmond.
Madame Merle accuses Osmond of breaking her soul. She still has feelings for him, which he has taken advantage of.
Madame Merle visits Pansy in the convent and runs into Isabel there. She attempts to talk to Isabel – it’s clear to both women that everything is out in the open now. Madame Merle admits that she is probably unhappier than Isabel, and resigns herself to exile in America.