Who could be the mastermind?

Hey guys, who could be the mastermind behind the misunderstanding between Robby, Kasturi and Raunak? I feel someone either from the Sabharwal or Singhania family is doing all this scheming plans. Or maybe it is a third party, that means a person known to both the families. I feel it will be Ishita and her dad, Mr. Mittal. Maybe Mr. Mittal is only involved and not Ishita. He knows that his daughter loves Robby and he is creating all these misunderstandings between Robby and Kasturi to widen the gap in their relationship. He doesn't look like such a bad person. But, as a father, he may be doing this for the happiness of his daughter. Someone else may also be involved i.e a person known to both the families, but, who has not yet been introduced.

Man I hope not cause the writers can barely handle the characters they have. I really hope the tie this mess up and use the characters they have cause the drama has way to many faltoo people around as is.. But I do think you have a good idea either way god i just want this mess cleaned up asap......