No, it's because she doesn't have the will to resist Anthony. He's been conditioning her, and emotionally blackmailing her, into doing whatever he wants. Whether she feels like it, or not. In this instance, if she has enough willpower, she can summon up the courage to say no, and mean it, so that Anthony backs down. Because essentially he's a manipulative coward. Myriam was always able to stop him, he'd just convinced her over time, that it was her duty as a partner, to always acceed to his demands. Anthony understood that her overly trusting and sweet nature, was a weakness he could exploit. Which was the main reason he was with her ( alright, her being super hot and rich probably played a part as well)