Q: If a brother touches his real married sister with lust, does it effect it her relationship with her husband and what about the relation between brother and sister?
A: It will not affect the relationship, but both of them should make taubah and maintain a reasonable distance from each other.
And Allah Ta’ala (الله تعالى) knows best.
Mufti Ebrahim Salejee (Isipingo Beach)
This answer was collected from MuftiOnline.co.za, where the questions have been answered by Mufti Zakaria Makada (Hafizahullah), who is currently a senior lecturer in the science of Hadith and Fiqh at Madrasah Ta’leemuddeen, Isipingo Beach, South Africa.