A son performing Hajj using his mother's money

Q: My mother sold a piece of land which she had inherited from her father. (Part No. 11; Page No. 38) She asked me to make arrangements for her second Hajj and that I accompany her on the journey. I am asking for answers to the following questions:A- Is it permissible for me to travel with her and perform Hajj at her expense? B- My mother told me that she made a vow to make a second Hajj and that I would accompany her on the journey. The vow was made while she was performing her first Hajj.C- I have other brothers and two sisters, so I tried to convince my mother that Hajj is obligatory only once in a lifetime and that it would be better if she distributes her money among her needy sons and relatives. However, she adamantly refused and said: "I must perform Hajj whether you accompany me or not.''

A: It is permissible for you to perform Hajj at the expense of your mother, and performing it, will absolve you of the obligatory duty of Hajj. However, it is not permissible for your mother to travel without the company of Mahram (spouse or permanently unmarriageable relative).May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family and Companions.