I get that Kalyani is behaving quite rudely with Malhar and I even get that she is blind to all the stuff being done by the Deshmukhs.
But how exactly can she dig into his life and his past at this point? He does not want her to do that, she tried asking him a few times how he got demoted and she even saw that he was taking those medications.
She can use her influence, but with what right? She is no longer his wife, they are not on speaking terms, so wouldn't that be an abuse of power?
TYSM. She could try asking Pawar, but I doubt he'd break his Sirji's trust and tell her everything so easily unless Malhar was in some kind of medical emergency. She could try reaching Kaka, but I doubt he'd trust anyone who's connected to the Deshmukh clan and doesn't trust his nephew, either, after what that awful family has put them through.
The only way to get to the truth without breaking some kind of law or invading his privacy, would be if she asking Malhar himself and he agreed to tell her, which doesn't seem likely at this point. And I'm not saying Malhar is to blame... had she not accused him of killing her first thing when they came face to face, he may have opened up, but seeing how she has no trust in him anymore, he also decided not to share anything with her.