I don't think he is over-reacting

Having said that - Raman is not over-reacting.

Here is a scenario - you are a loving caring parent who wants to be with your child since the child was born. For any reason the child is kept away from you. Now, you have this opportunity to be with your child forever, and all of a sudden a fear of loosing the child attacks again... any NORMAL parent will react this way. Shagun is not a normal parent ...or may I say a normal human being. So she had not connection or attachment to Ruhi but for Adi she had is because she is a sexist too. Mere bete ka future.. W*F about Ruhi's futer. She never thought of that. Anyways coming back to Raman, I think is reaction is justified. and at any cost, Ishita created this mess for herself so oh well for her!