Lear's elder daughters, Goneril and Regan, are competitive vipers with no loyalty to family.

WSJ: Lucinda Rosenfeld, Author of The Pretty One, on Sisters | Word Craft

But if some readers also find in them a hint of Regan and Goneril, I see no reason to apologize.

WSJ: Lucinda Rosenfeld, Author of The Pretty One, on Sisters | Word Craft

Eventually Goneril poisons Regan, then commits suicide.

WSJ: Lucinda Rosenfeld, Author of The Pretty One, on Sisters | Word Craft