What did Hester tell Roger Chillingworth when they met on the peninsula?

When Hester meets Roger Chillingworth on the peninsula, she tells him that she is going to make Reverend Dimmesdale aware of Chillingworth's true identity (Roger Prynne - Hester's former husband.)Hester says to Roger Chillingworth "I must reveal the secret. He [Arthur Dimmesdale] must discern thy true character, to discuss this matter with him, told him to be there for that discussion.