Kaira mystery..!!

Why do i feel that Kaira was indirectly responsible for whatever happened to her daadi.. and that is why she is scarred to face Nanu!!

From how I understood this serial , nani died when anuj ,avantika and preeti were kids so kaira couldn't have met her. Remember the epi when pankhu did
Pooja in da mandir and avantika sed nobody since her mom died has done pooja in diwan mansion . Sheila also sed nobody ever did pooja in diwan mansion until Pankhu came dere so that means that sheila also didn't mean
Naniji.

But has to kairas behaviour I have a feeling at the tym nana was at the helm of diwan industries and he was always busy wud work building diwan industries into a powerful company so his behaviour was also irritable , short tempered and his overworking could have led him to become ill were he needed to inject himself wud his meds ,she could have been scared of his mood swings and shouting and misunderstood his irrational behaiour as him taking drugs. I know its a long shot but I don't know what else it could be.

But i so feel that Kaira did some gadbad with medicines or something that someone suffered. And on Nani barsi also she was acting weird..

whatever the reason...now I am getting irritated...Cvs better come with some sensible and strong reason...