The spoiler found in below website...
http://www.latestgossipwu.com/gossip-10738-a
Nairan friendship have started, but sandhya is tensed that if naina get successful in uniting karan with family then her years long hard work will go in vain.
Sandhya thus instigates karan against naina's attempts to bring him closer to family for her selfish motive.
Sandhya's instigation works on karan and he lashes out at naina for entering his life.
Doesn't know to belive this spoiler or not but I think there are also possibility that sandhya would instigate karan and Nairan confrontation about it and again our Naina will win over karan and it lead for their better understanding about each other and helps them to come close
Sandhya long years plan will go in vain but what is her plan to take over all the properties of chauhan or some other thing...Any how next twists is exposing sandhya true character in front of family...Excited to watch