If Arnav had physical relation with LAvanya, sh would not have let go of Arnav so easily with so much of dignity, she knew that deep within that Arnav had nothing for her, it was time again showed that he was never attracted to her physically, and Arnav too the gentle man that he is would have felt guity abt it.
Its only Khushi's innocent beauty that evoked those feelings of desire in Arnav.
the word Live in was jst used to defy Nani. But was never initiated.
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