Seriously, Raman was right. Why doesn't Ishita want to listen to what Raman has to say? I find it really odd.
Ishita has seen for herself what a negligent mother Shagun is.. she has noted that Ruhi is left with servants most of the time when Shagun is off doing her own thing. And she knows that Shagun will be packing Ruhi off to a hostel as soon as possible.
Why then does Ishita believe her without hearing the other side?