Regret

Not ML but the father. Daddy dearest receives a holy message thing that says one of his daughters is gonna destroy the world and the other one is gonna save it. He only had one daughter then boom a carbon copy of him appears. He killed MC in first life, MC returned and fights back. She does not give a shit about her father anymore and the father is shocked

(family) MC's momma died while giving birth to her so her family started abusing her. Then she literally gets turned into a fucking sword for however long. She returns time and wants to destroy the kingdom as revenge by turning the emperor ML insane. ML will gladly destroy it for her. FL's family regrets too. The father literally talks to his dead wife again and she destroys him. Bro really thought she would be angry at an infant for "killing her"

MC travels to unfinished story worlds to grant the wishes of a character. For example, the ''villainess'' character from a book wishes to get revenge from a scheming bitch who took everything from her, FL's mission is to grant these wishes. She slays very hard and always wins at the end.

Rather than the ML, both sides did wrongs that were completely understandable. I'm hoping that they went to couples theraphy tho