i agree...kamini's character is quite real. we'll find people like her in every family. yes, she is sometimes too much, but she knows that her daughter doesnt speak for herself & sacrifices too much for her family.
Any mother would get angry to see her daughter (who goes out of her way for her family, lying to her parents for money & compromising her relation with her husband) given less attention than her nanad (who has spoiled her life herself, nobody's fault).
i think if kritika was a more balanced person, like speaking when she feels something is wrong & not being tooo nice all the time, kamini would have also been sober. In real life, the probability of finding people like kamini is 3 or 4 in 10 and kritika 1 in 100