Responses
Isn’t that unlikely since she abhors him and they don’t get along at all. It wouldn’t make much sense letting her brother onto her secret just to deal with him
Yeah, it could be unlikely (especially now it's been revealed he's in detention). I'm just thinking FL would require more man power to do all this rather just doing it all by herself. But again, FL is definitely more capable than she seems..
I have a feeling that FL probably asked her brother for help. I don't think she intentionally wanted to kill Jaeyun, but maybe just wanted to roughen him up a bit so he can give up the videos. FL's brother probably took it to the next level and in the end, killed him. FL takes the fall for this, hence, why she's in jail at the beginning.
I think the plot would be too obvious if FL directly killed him. The other plot twist would be that ML was actually the one who killed him.