Wa `alaykum as-Salamu wa rahmatullahi wa barakatuh.
In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
In this fatwa:
Responding to your question, Dr. `Abdul-Fattah Edris, Professor of Usul Al-Fiqh, at Al-Azhar University, states:
Also, she can accompany him in any travel, as he is considered a mahram for her forever. In the verse that enumerates the unmarriageable female relatives, Allah Almighty says, “… and the mothers of your wives…” (An-Nissa’ 4:23)
Allah Almighty knows best.
Editor’s note: This fatwa is from Ask the Scholar’s archive and was originally published at an earlier date.