Salam alaykom Am really shamed to say my question . I get engaged to very fragil girl and since the engagement her sister start looking at me after few weeks i become a weak and we kissed each other with hugs ... I really regret what i did . Now i want to marry my fiancee i dont know if it haram in chariha after what i done and what i should do ? Jazakom allaho khayran .

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and Messenger.

You are obliged to repent from what you did with your fiancée's sister. To learn the conditions for repentance, please refer to Fatwa 86527.

You should beware of being passive when interacting with non-Mahram women, like being in seclusion with them and the like.

It is not forbidden for you to marry your fiancée because you have hugged and kissed her sister, as this is not a legal impediment for you marrying her.

Allaah Knows best.