I saw many people questioning on Keerthi being quiet in front of KD and giving in to her words. So I just wanted to explain Keerthi's character here.
Keerthi is actually in a very vulnerable state. Her first marriage was abusive and a failure. We never saw her in laws so can't comment on their behaviour with her, but who knows they just might be dominating as well.
Keerthi is just learning to express her views and feelings openly in front of Naksh due to his support. She is flying in this new found love in her life. Right now Naksh is the centre of her world and family doesn't even cross her mind, they are just people living around with her.
Moreover GV culture is way different from SS, so it will take time for her to understand that culture and adjust in it. Being honest one can get adjusted to GV's culture easily as it's mostly of a nuclear family - no need to do puja together , eat with family, get things done by maids etc, it's only KD superstitious thoughts which one needs to get adjusted to, which is not a big deal but one coming from such a culture and then have to adjust to SS culture - believe me it's very difficult coz it's proper joint family culture. To top it SinghAnia's have presented Keerthi with a career which her own family still disapproves of and also SinghAnia's want Keerthi to take decisions on her own which she has never done in her life. So Keerthi has a lot in her platter to understand and learn at once, so right guidance is required which unfortunately she is only getting from Naksh .
Yes ! Only Naksh is giving her right guidance and no one else. KD's thoughts are way opposite to SS and she usually ends up giving advices which will only lead to breaking up of this marriage too. SS are adjusting more than they should adjust too. They are not telling her things which they are not liking. So for Keerthi it is fine but for SS people they are slowly collecting poison in their hearts for Keerthi specially Bua Dadi which will come out once Keerthi does some big mistake.
Instead of trying to rectify Keerthi and making her learn their culture , they are giving her free pass and going on adjusting so it's natural for Keerthi to take things granted and commit a big mistake which she cannot be blamed for.
Even yesterday Bhabhi ma happened to listen to her conversation with KD which was full of poison. She took the first correct step by making Keerthi prepare tea and making her feel at home. But the second one would be , her having a firm talk with both Keerthi and KD about this in private which I guess will not happen. So showing only one time concern is not the solution and neither is pushing your daughter everytime to make your daughter in law feel secure.
So basically Keerthi is not at fault, it's her elders who are leading to wrong direction.