I never understood it. She has much more problem with Aastha than anyone in the entire Sabherwal household.
Badi maa's day starts and ends with cursing Aastha.
But I don't understand why she hates Aastha so much? It clear she doesn't love Shaurya that much. She doesn't even understand him. He's more of a trophy for her who she flaunts in front of everyone.
Notice how she taunts Shaan everytime by saying she took care of Shaurya while Aastha left her child behind.
Do you guys think there's some backstory for Badi maa and Aastha too? Maybe she's jealous of Aastha?