What I don't understand is why TF she cares if he cheats. She knows they aren't really together, she knows the closest she ever gets to him physically is when he pinches her cheek like an auntie, WE (and she) all know she paid him $9k to be with her 3 yrs ago, and she knows they aren't really married even if it is a misyar. It's not real, she knows this. Why does it matter if he "cheats"?
1) mostly control.
2) despite her broken humanity and own inability to love others in any meaningful way, deep down Chantal does want to be loved herself. She perceives it in a strange way (you just need to fake love me and I'll be yours forever!) And stuffing her face with food feels more like love to her than anything else ever will.
But she does want to be loved.
For healthy married couples, a certain amount of jealousy is normal. For couples with open marriages, even if they pretend to be super enlightened and above it all, a certain amount of jealousy is still normal. A lot of people agree to an open relationship and then can't handle the jealousy. And a lot of people date people who already have primary partners and realize they don't like that, either.
If what you really want is love, then it doesn't feel good to be a side piece.
If what you really want is love, it doesn't feel good to know your partner is pursuing other people. EVEN IF your marriage was a sham from the start. It probably triggers her feelings of being rejected by Nader and abandoned by her dad. And I mean triggered literally, like it's am involuntary emotional reaction, not a logical one.
Regardless of how this relationship started, if Chantal went to live with Salah 100% knowing it was a scam, there was part of her that believed that once she was there, he'd eventually love her. "I just have to get inside his house!"
That's why it hurts when he texts other bitches to scam. Even though she knows he met her the same way, she thought/hoped that she'd be special, and this time, finally, someone would love her.