A woman going on hajj with her father-in-law

Question:

Hajj is obligatory on a woman but she does not have the money to take
a mahram with her. Her father-in-law is going for hajj. Can she travel
with him for the fulfilment of her fard hajj?

Answer:

A woman can travel with her father-in-law for hajj. If there is a fear of
tribulation, she must avoid being in privacy with him. The male must
remain with other males, while she must remain with the females.
Even if there is no fear of tribulation, they must remain separate in
order to save themselves from suspicions and whisperings.

When a woman is travelling for hajj, it is essential for her to travel
with that mahram with whom marriage is forbidden for the rest of her
life. The forbidden person could be on the basis of being her relative
[e.g. father, brother], foster-hood [being breast-fed by the same
woman], or on the basis of marriage [e.g. husband’s father].1

Allah ta‛ala knows best.

Reference:

1 Zubdah al-Manasik, p. 32.