Why does it have to be an affair? Can't it be some false blame put on Prem where he was at the wrong place wrong time! You also created another topic about the precap where you stated Prem is having an affair or kissing, it isn't shown what exactly was happening, just that they were standing very close, so Simar can be shocked due to that reason, because she thought that she is someone new and unknown to the area and people, she doesn't know this is the girl blackmailing Prem!
And as for the money, you give it once, and the person just comes back again for more!
I am not trying to be rude, and I am a bigger RoSid fan than Prem and Simar, but we don't need to assume the worst of the other lead pair!