Franklin D. Richards on Polygamy and Bigamy

Franklin D. Richards said: Now, I ask, who is injured by a man taking a second wife, when the wife he now has is agreeable and it is mutually understood between her and him and the newly affianced ; it being entered into with a mutual understanding and a mutual agreement according to the law of God—I ask, who is injured? Wherein consists the crime of bigamy? It is this. When a man takes one wife he covenants to adhere to her until death do them part. He violates that covenant when he takes another woman, unknown to his wife; he thus practices fraud upon her . - Journal of Discourses vol. 26, p. 341 ( byu.edu )