Answer:
(Fatwa: 686/686/M=1432)
Your nikah with your wife is intact. Your wife did not become haram due to touching the sister-in-law, but you should observe extra care in order to avoid such acts in future. Distance yourself from her and do not make her sleep close to you. You should repent to Allah and ask for His forgiveness. Also, one should not indulge in sexual activities with wife between navel to knee in menstruation without a cover.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
