What is the ruling on marrying the daughter of a woman with whom a marriage contract was concluded but with whom he did not have intercourse?

The questioner:
If a marriage contract was concluded with the mother but he did not have intercourse with her, is she forbidden?

The Shaykh:
And what do you mean? He says: If a marriage contract was concluded with the mother but he did not have intercourse with her. How do you say "have intercourse with her" with the fathah? Yes, pronounce it correctly. "Did not have intercourse with her," not "did not purify her." "Have intercourse with her" with the jazm, yes.

The questioner:
May Allah reward you. He did not have intercourse with her, so what is the ruling on the daughter in this case?

The Shaykh:
What is it? He says: If a marriage contract was concluded with the mother, and he did not enter with her. Allah, Glorified and Exalted is He, says: "And your stepdaughters in your care, with whom you have had intercourse ." So if he is alone with her mother, the daughter is forbidden to him, whether he had intercourse with the mother or not. The seclusion is what is meant by "with whom you have had intercourse," yes.