Which of King Lear's daughters truly loved him?

Cordelia was the only child that "truly" loved her father because she had no ulterior motives and told him the truth. Her sisters, Regan and Goneril were plotting against their father. They intended to shorten his reign almost immediately after they received their inheritance. Cordelia, who had been exiled and disinherited, still tried to help her father after things became tumultuous.