In yesterdays episode we saw how Ishita ended up gaining Yashs sympathy totally and how she even gave a sarcastic shirk when Yash said he will try to make things better for them. Ishita is in a full on revenge mood I personally think she just wants to make AKaash like Yash and will slowly end up making Yash like a guilty person so that he will have to leave the house soon.
Yashs guilt of leaving her midway during her wedding has made her hard on the inside avengeful though shes all soft outside and so is able to influence Yash with her words. Its now left to be seen if Aarti can see things with time and whether she can save Yash from Ishitas trap that shes laying for him.