Is a man’s prayer with his wife, his sister, or one of his mahram (relatives one may not marry) considered a congregational prayer?

Question:
He says: Honorable Shaykh, may Allah grant you success, if a man prays at home and his wife, his sister, or one of his mahram (relatives one may not marry) prays behind him, is this considered a congregational prayer?

Answer:
No, but it is considered following. The woman follows him in his prayer, and this is not considered a congregation. A congregation is not established by a woman. The condition for a congregation is two men or more.