True,pallavi took it to extreme with prachi. But at the end of the day her son did get arrested for stealing. And he wasn't framed,he actually did it. So in pallavi's eyes prachi is a bad influence who is getting her son to steal for her and go against the family. Also ranbir has gone to jail so many times for prachi, even during MMS track. And Aliya tried instaigating but she did support prachi. Because she knows Ranbir did it to protect a girl. But this time he actually stole. Which mother would want their kid to be involved with someone because of whom indirectly your kid ends up stealing? From a mother's POV she is right. And mothers are not always rational when it comes to protecting their child. With respect to prachi supporting Ranbir,she did help but she never did anything illegal for him.
And also with respect to her believing Aliya and Rhea,why not? They are her family after all and 10 lakhs is missing and objectively when the thief points at prachi then what intention could that thief have had? Given abhi and Vikram surprised them and hit them and brought them home. So it's not even like there's enough time for someone to come and manipulate. We as an audience know about Aliya and her schemes but they won't. And again 10 lakhs is missing and the thief blamed prachi so it is fair to raise suspicions right? It's business after all,you never know. But then again she should have spoken to pragya and stopped prachi's arrest. That was too far. Her anger and her actions also make sense.
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