The ML is misguided. I understand she reincarnates into a novel where she's aware of the plot but the ML shouldn't have fallen for her. She cared for him when nobody else did and showed him affection, something he never received before. That's not love though, it's imprinting. He's just clinging onto her because she's the first person to have ever shown him he mattered and I get it, it's just pitiful to see. Not only is he possessive, he wants to monopolize her for himself. She understands her position and he doesn't. A duke and a maid as a couple? That's such a large gap in status, not to mention everyone is judging their relationship. She was an older caretaker/nanny to him and he became her employer. He doesn't understand that as he calls on her to try to ease her workload, that's going to create resentment between her and the other maids because they'll see her as a gold digger who's just hanging onto him. Either way, she knows that she changed the story so there's nothing to do about it now.