Its just my opinion. Feel free to disagree. But to be really honest I don’t feel Aparna reaction is wierd/inappropriate. Because to her Malini is her daughter in law. And Imlie is the one coming between her son and daughter in law.
True that she is not confronting Aditya or Malini but if family thinks someone is coming in between them. First reaction is to take away the person from their personal equation. I don’t believe Its wrong.
I know many believe that family favors Malini a lot. I know this is fictional but any one would be lucky who get such in laws who always supports you. So I don’t blame Aparna. She is just trying to save her son’s marriage.
I think saving her son’s marriage should entail speaking to her son about it. Yes it’s not weird, many would blame the other woman rather their son. But it’s hypocritical for someone who claimed they loved the girl and considered her their daughter. Mostly, based on her words ‘iss baar isse dheel nahi doongi’ that word dheel. Making her sleep in the kitchen is not going to solve anything. That word clearly states beneath all that love, she was only a maid at the end of the day for them.