Lol are you spoiling for spoilers? Just give it a read. You won't be disappointed. The author isn't a messy writer. Besides I hate stories where the angst gets dragged on for dozens of chapters so if you're like that too then this one is good. Promise!
They cheated on her. Ex-bf was frustrated MC didn't want the snusnu with him. Stepsis was jealous of MC and wants to steal everything she have so she starts with ex bf first by seducing him to bed. They're more of sex friends than real lovers though and the relationship ends immediately after MC found out. Then MC's revenge for stepsis started and boy you woulda clap hard for her. It was a sweet, sweet revenge.
Damn. This is what a revenge MC should be!!! Fuk filial piety, what's that? Can it be eaten? XD So satisfied with MC father's fate. But what happend to make MC stepsis jailed? What about the ex boyfriend? the scum.