Bear with me, but the notion of Nader slapping and otherwise forcing Chantal to engage in sexual acts she does not like made me think of at least two times when Chantal's big bad bitch mask slipped.
One: Right after Bibi broke up with her, Chantal was sitting at their old table, cutting up food for a mukbang, and she experienced rage, shame, and fear at the simplest push back.
@Dutch Courage ably summed up the interaction and it's interesting to imagine that range of emotions as she deals with Nader, who has zero real affection for her and no reason to respect basic rules of interaction.
All Bibi did was complain that there was literally nothing for him to eat in a refrigerator overflowing with food. She can tell he's upset and offers to make him a grilled cheese sandwich, which he doesn't want. The implication is that he had shopped for food for himself and she had eaten it because he had the expectation of there being something in that wasteland of rotting food and takeout cartons that he could eat. She had been presenting the meal she was making as a dinner for both of them but he criticizes the way she cuts up the vegetables, showing how little he wants to consume any more of her poorly cooked food. In the past he seldom said much on camera and this was the most we'd heard from him, even taking into account those videos where she made him cook with her. She could not have been more shocked had he openly slapped her.
Her face went from grinning maniacally to being blank, the sort of blankness that happens when someone knows they are caught in a lie or about to be. Then she got a sullen look wherein she was clearly angry, and she flashed back between that expression and one of low-key fear, like a child who fears punishment. She was not afraid of being hit or anything like that. Bibi isn't that sort of man. I'm not entirely sure what she was afraid of, but she became meek, quiet, over-explaining and visibly shaken merely because a man who had treated her kindly for years told her she was going to burn the onions and was upset she'd eaten all the non-rotting food.
Two: The search function is failing me because there are too fucking many times Peetz gave Chantal a side eye or pushed back at her when they were eating in the kitchen. I don't even remember what the conversation was about but Peetz was razzing on her. He made a contemptuous remark to some boasting she was doing and the moment she realized that Peetz was not backing her up or praising her, her face went blank like she did with Bibi. From wide, horsey grin to blank face filled with fear. She followed it up with the rat face, then began laughing again when she understood Peetz was not going to continue to make fun of her or challenge her version of reality.
This is a woman who cannot negotiate any sort of situation wherein she needs to assert herself. She puts on a good show of being a bawdy, lusty woman who just doesn't care about housework who only needs men for fucking and can take care of herself. And she's so lacking in self-awareness that she posts proof of her fearful childishness even in edited videos.
I keep imagining that series of reactions when Nader first demanded she shower and let him shave her. We know exactly how she reacted when he pressured her into anal, unless, of course, she had no warning and not even he saw her face. Imagine that series of reactions when Bibi, frustrated after years of putting up with her eating issues now happening when an abusive ugly loser slaps her face for being smart-mouthed or ass-fucks her without consent or lube. She really has gone from the frying pan into the fire. And I think I know what it looks like when the heat gets turned up. I wonder how Nader reacts when she gives him the rat-face. Not well, given that she is pre-emptively explaining facial injuries.