
The way head maid told the twins be grateful for the emperor. It's like they are not the Emperor's children but some others. Like some kind of freeloaders. They have the right to enjoy the luxury. It's not like the emperor became the emperor by his efforts. He became the emperor because he was the former Emperor's son. Why should the twins be thankful to anyone. Don't forgive the emperor so easily. When you were abused and mistreated he wasn't there for you.

Got to say that is just the maid's words it is never shown that is what the Emperor said or thought of them.(⊙…⊙ ) I saw the raws and I won't spoil too much for you but from what I got of it. ( I can't read Korean btw)
Is that she ( the maid that is assigned to them) is basically overusing her position ヽ(`Д´)ノ to bully the kids into thinking they are not wanted and that the Emperor doesn't want or care for them if they are not "perfect tools" (︶︿︶)=凸 I won't say what happens exactly because as I said before I don't want to spoil it but she basically gets what's coming to her later on. (๑•ㅂ•)و✧ヾ(❀╹◡╹)ノ~
If you want to be spoiled let me know and I can give you them as of now I have read all of the raws that are available up to date.(๑•ㅂ•)و✧
Dude just admit it you like him. Or just give the other dude the chance.