Is it permissible for a woman to go to Hajj with a group of women, and for her daughter's husband to be her mahram from Jeddah, then leave her to complete Hajj with the group, knowing that she fears her daughter's husband might be deported from Saudi Arabia?

In summary: If a woman assumes ihram from the miqat and then goes to Jeddah, and then to Makkah, this is not considered travel. If she travels for the obligatory Hajj without a mahram but with a trusted company, many scholars permit it. However, for a voluntary Hajj, the majority of scholars do not permit it, but Ibn Taymiyyah holds the view that it is permissible with a trusted company. The miqat for this woman is Qarn al-Manazil. If she passes by al-Juhfah, she should assume ihram from there. If she enters Jeddah without having assumed ihram, she must return to the miqat, or she owes a sacrifice (dam) if she assumes ihram from Jeddah.