Can someone be with me and also blame Seoin's adoptive mom for what Jaewoo has become? She turned a blind eye on Seoin's sufferings, Jaewoo's abuse towards him and made him tough it up. She didn't really love him, she just love the fact that there's now a replacement for her dead son and continue the career she used to have. She took advantage Se-in's longing of having a "loving mom" so he can endure everything. She also covered up Jaewoo's abuse on Youngwoon.
Jae woo is fucked up but ghaad that's also because of her selfishness forcing a child to like/love her replacement for his twin brother. I know she was grieving but she still have another son who's living and needed her love. Idk man. I wont be suprised if what happened to chapter 1 to Youngwoon will also be because of her.