Responses
Papa took Woo Young back home but he ran away back to his boyfriend's house.
Boyfriend/Seme = Cha Kyung Jo.
Kyung Jo knew Woo Young's papa took him. He also knows his "father-in-law" hates him because he thinks Kyung Jo is playing with his son. So to make sure Woo Young's papa knows how serious he is about their relationship, he was going to propose.
And he did propose. It just so happened that Woo Young is also pregnant after spending a rut with Kyung Jo.

He was kidnapped then they got engaged? Am I on drugs? Who am I? Where am I? Aahhhhh