Must a person who engaged in an illicit relationship (foul language) with his fiancée's friend - whose identity is unknown to her - confess this to his fiancée, knowing that he falsely swore to her that there was no such relationship, and that confessing will prevent him from marrying her?
This person must repent to God for his ugly deed and for swearing by God falsely. He must conceal his actions and not inform the woman he loves or anyone else about what he did, because disclosing it is an open declaration of sin, and an open declaration is a grave sin.
Summarized from the full answer at Ftawy · reviewed Sep 2, 2026
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