Kuhu is hurt as Mishti is always a center of attraction and this hurts her more because Kuhu is actually a child of that house however Mishti is adopted. Here, Kuhu feels that inspite of belonging genetically to that house, Mishti is given more importance. And that feeling is bad. I have personally faced this in my life. So I know how it feels when an outsider is been given more importance. On the other hand, Mishti always interferes where it is not required. She comes forward as if she is the most smartest person and this is the only thing I dont like about Mishti. Otherwise she is a good human being but I feel that Kuhu's anger is justified though she overreacts at time. But that feeling of getting sidelined is actually hurting her.