The spoiler found in
http://www.latestgossipwu.com/ek-shringaar-swabhimaan-t
Meghna already upset with naina marrying karan because of her sake and also finds that they are not having good relationship
Karan is not ready to accept naina as his wife and want to throw her out of chauhans house, meghna get irks more
Not only this, sandhya evil avathar against naina irks meghna more, sandhya keeps on taunting naina
Naina takes up all these in order to become good bahu of chauhan family but meghna isn't same thus plans against chauhans
Naina noticed some changes in meghna behavior and thus tries to confront her for changed behavior