I disagree with you and I'm very happy with the way Sona is dealing with Dev's cheapness. She bought the office space because it was for sale in the market and paid the market fair amount but Dev is not able to digest this fact then that's his problem but he has become so blind with his arrogance and anger that he is not letting Sona work peacefully. He is been creating problems for her every time be it snatching the award from her, kicking her hotel door, breaking the wall, nameplate, calling the police, and now it was extreme that he locked her in the office for a night, I mean how cruel can you be, how more will you stoop?
A self-made woman has reached up to this level and you are taunting and questioning her character, WHY? Just to put her down and lower her morale so she leaves your building. Come on Dev, be a man, don't be kiddish. Now that Sona has complained about his office's illegal activity, that you think is wrong? I DON'T THINK SO! If somebody does that to me, I would also try anything possible to get out of the situation, in fact what she did was very less, I would move the office upside down, check the drawers or anything just to find something that could help me get out of that place. And she didn't purposely check his paper. So far I didn't find anything with Sona's activities or behavior compared to Dev's behavior who has become a complete jerk who has no sense of right or wrong.