People are forgetting about her divinity bullshit, and that breaking up was also a move for MC's future. Sticking to MC would've made her more of a thot if she knew she wasn't going to be MC's wife and would've sown discord between true FMC, making MC have a hard time choosing. She loved MC but knowing this she still chose to break up with him. She truly loves her husband as well to go as far as talking to the guy and begging her first love.