Why? Siblings exist and he just happens to be related. Just because they are related does not guarantee they will be the same.
I hate the he’s my ex brother I already seen different story like that and don’t understand the appeal of that. The whole cheat on me now I am with your brother
It's more of a "I just happened to fall in love with your brother as me and your brother have a lot in common." Especially since she doesn't even know so to her this is a completely different person. Same as when you find out the person you're now dating is your ex's cousin.
And beside of she's not cheating he is the one doing the cheating. She want to divorce
Why does the ml have to related to her ex?
I hate it when the story does that it gives me the biggest ick.