People can be enemies and lovers at the same time, you know.

Luhan is the north pole, Irene is the south pole, those poles always try to find a way to unite. Irene: What are we doing in your mansion? Luhan: Let's make a deal, I'll give you anything to destroy Yoon Jangwoon, and you'll give me anything Irene: But---- Luhan: You can't live as a pauper when you were born as a princess, Irene Irene: Alright, as long as Yoon Jangwoon suffer, deal

Twins from a different mothers? Hell no!