Writers want to prove Babita is cynical, with her revenge mentality..
Also she is delusional that Amruta purposely tried ruining all of Nimrit's functions/parties as her own parents marriage broke, so Babita wants to do same to Chitnis family humiliating them & by ruining Amruta's happiness.
Have said this earlier too, Babita might be main trigger for Virat's separation with his ex-wife & his divorce proceedings, but entire blame might have gone on Priyanka's head unaware to Virat, by branding her as gold digger & evil. But Babita wouldn't have expected after divorce Virat will be so deeply impacted to ruin his peace for many years with bitterness, becoming averse to new relationship & marriage.
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