Is the sister’s husband considered a mahram (a relative one may not marry) if the journey is short, lasting two hours?

Question:
Honorable Shaykh, may Allah grant you success. He says: Is the sister’s husband considered a mahram if the journey is short, lasting two hours?

Answer:
The criterion is the distance, not the time. The criterion is the distance. If the journey is eighty kilometers, it is not permissible for her to travel with him except with a mahram. Yes. Also, if she rides with him and he is not a mahram, that is seclusion with a non-mahram. That is seclusion with a non-mahram. It is not permissible for her to be alone with a man who is not among her mahrams. Yes.