RamonaThePest

At first FL is not likeable. She seems to be a schemer and a manipulator. But as the story unfolds, you realize that had she not done the things she did in the early part of the drama - coming on to ML, acting as if she wanted to complete the sex act but once he finally gives in, she suddenly reverses. This seemed very puzzling but eventually you realize that he would have kept her in the role of plaything and never married her because of his trauma related to his mother's death and FL resembling the woman responsible.

I also felt some type of weird way because it almost feels like "grooming" if you read into the lines like when they're about to consummate, he says "remember what I taught you". The only thing that makes this a little less problematic is I do think he waited until she became an adult before being inappropriate with her, I also think he tried to resist somewhat but sis was going all out.

A huge plot point is FL was a child (I think they said 8) when she "blackmailed him to take her in". (He was a teen/no more than early 20, I think.) But I'm still not clear what she possibly could have blackmailed him with. Of course, it could be a shortcoming with the writers but it could also be a subtitle issue. That has happened where I've rewatched a drama from a different YouTube channel or different streaming platform and suddenly everything makes sense.