I have also felt from day 1 that his target is Raghav not Pallavi. He is just using her.
I also feel that mandar may be really lusting after pallavi but his end target is to destroy raghav emotionally and reputation wise too.
May he some kind of business rivalry when raghav was in illegal work and as ved knows mandar , mandar can't be that innocent which his family makers point him to be. Raghav may hadn't directly known or see his face when mandar was in illegal work
Basically mandaar wants both things of raghav, his wife and his position too.
At this moment his first target is raghav wife pallavi. When he will achieve this target by bringing pallavi to d house, then he will work on destroying raghav financially and the last step will be raghav losing all respect and contacts in society