I think Ridhima is guilty, embrassed and what not ? We can clearly see this in that one scene between the daughter and the father. Some people have this strange way of removing these kind of frustations on others. Especially people who are close to them. I think that is the reason for her blasting scene. Probably they can be best handled by first consoling them and then confronting them. Worst would happen if they are confronted directly. Probably thats what happened when Arman confronted her. End result, Ridz more distrubbed and troubled.
May be ? (possibly) sid will do the other way round and hence will be able to handle her. This is what possibly effects Shashank's decision
PS : However I think Arman is too heart broken after seeing Rid-Sidz scenes. I think his pain is also of enoromous level if not greater than hers. So, I don't think he will be in any position to heal her pain. So, I expect Sid to do this.
PPS : The story is becoming interesting again..