In Chapter 44, Pip visits Satis House to confront Miss Havisham and to profess his love for Estella. What reasons did Miss Havisham have for misleading Pip into believing she was his benefactor?

In Chapter 44, Pip tells Miss Havisham that he is unhappy with the way she led him on to thinking that she was his benefactor and the manner in which she hinted that he and Estella were destined to be together. It was his own fault, says Miss Havisham, just like it was the fault of her relatives to believe this was the case as well. 

Pip is justifyably angry at both Miss Havisham and Estella, though he forgives them both without them even asking because he realizes it was his own folly that brought him to unreal expectations. Estella's and Miss Havisham have vastly different reactions to Pip's break down in front of them. Miss Havisham appears to be touched, finally, and Pip's broken heart strikes a chord in her own heart. Estella, on the other hand, appears amazed at the show of emotion and doesn't seem to understand it. She is not angry, she is curious, as she really doesn't know what it means to love as Pip is now loving her.

Their reactions may also be an indication of culpability, in the sense that some characters are more guilty of their sins than others because of the level consciousness in their actions. Miss Havisham deliberately set out to break Pip's heart through Estella. Estella, on the other hand, is unconscious of what she did. She only acted as she was brought up to act.