We just arrived Dubai. We talked to the cabin crew at boarding, and they advised they would try to put me into business class prior to landing.
When we are about 20 minutes before landing, one crew came to me seat and explained there would be just one air bridge for the entire aircraft, so Mum can just wait for me at gate.
So we just meet up at gate after landing. All crews are very professional and very caring.
Thanks all for your kindly suggestion.