ANSWER: Of course he is sinful! He must have stepped back and not allow her to touch him, let alone hug as Prophet ﷺ said its better to be stabbed in the head by an iron needle than to touch a non mahram 

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ANSWER: The Prophet ﷺ said: My ummah would never agree to a misguidance  Meaning that there won’t be a unanimous decision over a misguidance.

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