Answer:
(Fatwa: 226/H=81/TH=1433)
You committed a heinous act. It was nauseating and bad. However, it did not end or nullify your nikah with his granddaughter. Your nikah is still intact, though you committed this act before marriage or after marriage. In both the cases the ruling is the same.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
