And if he chooses her for his son, he must deal with her as with a daughter.

Exodus 21:8
If she is displeasing in the eyes of her master who had designated her for himself, he must allow her to be redeemed. He has no right to sell her to foreigners, since he has broken faith with her.

Exodus 21:10
If he takes another wife, he must not reduce the food, clothing, or marital rights of his first wife.

And if he have betrothed her to his son, he shall deal with her after the manner of daughters.