No movies please!! They should preferably not end like Valid Love where she goes back to her husband. Also any good older women/younger men dramas are good too!!!
'Good Witch' has some elements of this - the protagonist is married, but her husband cheats on her. But then there's also a puppy love element by the guys who end up falling for her so it may or may not be something for you
I'm currently watching one called "My love Eun dong" it's a good one but I don't want to give anything away as to not ruin the story. But the relationship is definetely a dilemma and very conflicting.