Answer
(Fatwa: 1796/322=TH/1430)
The Shariah ruling does not depend on someone’s willingness and denial. The non-mahram relatives especially brother of husband among in-laws was regarded as ?death? in hadith. Therefore, you should try to observe complete hijab and repent to Allah earnestly for shortcomings occurring in this regard. Keep yourself restrained to define the status of any Shariah matter; since it may lead one to the pit of disbelief and it sometimes results in devastation in this world and the hereafter. May Allah protect us all!
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband