Chillingworth says to Hester, "A fiend! Who made me so?" What does Hester reply? What does Hester then say she must reveal?

Hester answers, "It was myself!” cried Hester, shuddering. “It was I, not less than he. Why hast thou not avenged thyself on me?”

Hester feels she must tell Dimmesdale what an odious fiend Chillingworth is.