Shakshi's sixth sense has already alerted her to the fact that somehow some way Durga is a danger to her and her beloved son.
Shakshi likes to be the one to keep control and have Shaurya do as she says.
And now she sees that Shaurya is getting obsessed with trying to gain Durga's attention and knowing that her son really is an Idiot she is not looking forward to cleaning up his messes again.
Shakshi has been # 1 in the family and now seeing her husband and her son being impressed by Durga just irks her to no end.
So all she wants to prove to them is that Durga is not what she seems and will disrupt the Goenka's bond that they shared before.