ANSWER:

It’s not permissible for her to travel with him or go for hajj as he’s a total stranger to her and she must cover in front of him at all times.

If she doesn’t have a male mahram to accompany her for hajj then hajj is not mandatory upon her.

I’m adopted so can my mother perform hajj with my husband ? As I’m adopted so he becomes non-mahram for her and there is no other mehrams in my family who can perform hajj with my mother and my mother is above 60 years.what to do in this situation if there is no mehram