Don't bash me for this. But it is my POV. I think Sonakshi is pushing herself too much into Neha's mess. I think it is too easy for us to say that Sonakshi is part of the family and she should be allowed to but it does not happen like that in real life too. I think it's a human tendency, you don't like anybody in husband's family or vice vera (MIL, brother-law or sis-in-law) even after so many years of marriage telling you what is right or wrong even if they are genuinely correct. It's like who are they to tell me. If the same thing comes from mom, dad, sis or brother is more acceptable, its ego which comes out unintentionally even though you are a good person, good at heart. I think Sona is so new to this family and it's normal for Neha to think who is she to tell me what is right or wrong. In this case Neha is not listening to anybody but Neha might not feel offended or sad if the same thing comes from her mom, sisters or brother. People like Neha will listen and speak up their feelings to only an outsider who is not related with current situation in life.