Basically Sachin is your husband who's a very rich business man, although that's what you thought. With being a rich and successful businessman he was also a Cid office inspector above everyone, even you. But he was an undercover inspector which only few members of Cid knew about.

You were a senior inspector of CID and you didn't knew the man who's your boss is actually your husband since no one knew the boss name which is Sachin. He kept it hidden from everyone as he was a undercover.