Akshara cried because she lives Abhi. Is that so difficult to understand. She feel pain too. Pain is not reserved for Abhi with his demands and his desire for immediate gratification of those demands.
Akshara also understands Anhis pain. She does but because of the way she thinks this will break her family, because of the way his father treats her and thinks of her, she has taken a decision not to marry him. And she knows he is also in pain. She told Arohi this and she knows he loves her a lot. Just like she loves him.
So Akshara took the decision to not marry Abhi for her family. He is now taking the decision to marry Arohi her sister, not any other girl in the world, for his mother.
But when Manjiri dreamed her marriage dream she didn’t have Arohi in it. It was just Abhi on his own getting married. She doesn’t care who he marries.
Akshu has caused Abhi pain by rejecting his love for her and by suppressing her love for him, to not allow her family to break. He is now taking a knife to her soul and twisting it to supposedly satisfy his desires for his mother to happy, by moving on with her sister.
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