Genesis 38:16

Not realizing that she was his daughter-in-law, he went over to her and said, “Come now, let me sleep with you.” “What will you give me for sleeping with you?” she inquired.

And he turned unto her by the way, and said, Go to, I pray thee, let me come in unto thee; (for he knew not that she was his daughter in law.) And she said, What wilt thou give me, that thou mayest come in unto me?