I know she is very unmeaning, and she always gets sways when it comes to Pillu, but this is just a recipe for disaster. Avni I feel like will use this eventually to emotionally blackmail her.
Avni will either blackmail her or she has the chance to play the wronged woman in front of society which will further malign Kalyani's character.
Unknowingly Kalyani is trapping herself with Avni.