But that is only because she is too immersed in her own troubles to look at Gopi and her relation. Her only aim now is to get into Jigar's good books. She may not even have tried that if she had succeeded with Baa. But she did not and she knows that her MIL may change but will be of no help against Kokila.
I think her first act of saving the pigeon was true and after that it was the effect she saw the bird had to her relation with Jigar that made her continue taking care of it. Actually taking care of the pigeon itself seems to me as her excuse to get out of doing work she was assigned.
One act of kindness does not make you good at heart. She is still the conniving person she was before..