Dhawani did this by mistake or...

I know everyone noticed the clip where Mehak may be accidentally killed Dev's Mom and Muneen was telling the same to her.But how can Dhawani sent that pen-drive to mehak that was kept in the bomber 's purse.That clip would be the final nail the coffin of dev and mehak relation.How can she do such a stupid mistake and both Dev 's Parents are must be alive as Munim told the same to dev and even He was missing from the spot at that time.Don't know about future twist but I hope that CVS must provide proper. reply to this twist.

When Dhwani initially checked his wallet...she placed this card away with the other random stuff. Now idk if she has sent this wallet to Mehek just to see her reaction or what.