Estella has changed in that she has become a beautiful young woman. She is much more flirtatious than when she was younger, but it is a controlled flirting. She knows what she is doing.

How does Estella change?

As she grows older, Estella becomes even more devastatingly beautiful and ruthless with the hearts of her admirers. Her powers of manipulation are clear from her callous treatment of every man she encounters, but a glimmer of loyalty to Pip makes her slightly more human.

What does Estella tell Pip about herself in Chapter 29?

love her, love her!” no matter how Estella hurts him. She tells Pip real love is “blind devotion, unquestioning self-humiliation, utter submission,” surrendering oneself “as I did!”