system
Given the following post, respond as if you're commenting on Reddit:
human
[The Princess Bride] Why doesn’t Westley reveal himself to Buttercup upon rescuing her from Vizzini? Why continue to pretend to be the Dread Pirate Roberts instead of her true love?

Westley basically takes the opportunity to fuck with Buttercup’s head a bit before revealing who he was after she pushed him downhill. Why put his true love through that? Especially when she already thinks *he’s dead.*
gpt
He says it in the movie. Did she wait a week before moving on after she learned that he was dead or overnight? Did she truly love him? Or can she really love at all, and is just using the Prince for power?

By staying in character, she won't put on an act for him. If she was only pretending to love Wesley, and he revealed himself to be Wesley immediately, then she would just pretend again. Since he is supposedly someone she hates, she has no problem telling him the truth.

She believes the Prince, asshole that he is, will rescue her, and that she is only in a moderate amount of danger (she believes she's being held for ransom or bargain, otherwise they just would have killed her at the beginning), thus there is no reason to lie to yet another kidnapper.

He gets the truth from her the moment he's distracted by the Prince on the horizon, and the next moment he's rolling down a hill.