Ramban on Genesis 12:19/רמב"ן על בראשית י״ב:י״ט

1SO THAT I TOOK HER TO BE MY WIFE. The meaning thereof is that it was Pharaoh’s intention that she be his regal wife, not just his concubine. Pharaoh mentioned this to Abraham so that he should confess to him if she is his sister, as I have explained.