No, you will not be sinful unless you have committed something that is haram or neglected something that is mandatory.

Will I be sinful if I leave the sunnah?

Sins | March 16, 2014 12:57 pm
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Sheikh, my brother forced me to buy for him cigarettes. will i get the share of sin of every cigarette he smoke? i had no choice but to buy.
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I am living in darul harb country(india)my question is.. is riba allowed or not?