I would support Ganga's frame of mind as of today. She first thought of sharing her inner mind with her husband, hoping that J too will feel and sense the matter in the same way as she does. And if so, then he is in a better position to talk to Anandi considering how frank J and A have been with each other all along.
I have seen J and A sharing a better friendship (openness in relationship and conversation), regarding various matters (such as J's third marriage, Saanchi, J supporting A during Shiv's death etc) while Ganga has mostly received support from A, or been a silent support to A. So in that context J would be a better person to speak to A, if he also thinks the same as Ganga.
Coming to Ganga, her though process in analysing Abhi's mind set is very right. It is the unintended 'bhed-bhav' that is hurting Abhi.
On the other hand, Shivam is no less. He is a kid and believes in tit-for-tat, but so far he has not got scolded. If Shivam is treated with leniency compared to Abhi, in this bag change drama, then I will not blame Abhi or Ganga for the resentment.
And at that point Ganga will have to take matters in her hand, as both Jagya and Anandi are failing to see the seriousness of the matter.