SPOILER !!!!
after their jeju trip the ML had to head back to London. While he was on his way the FL was also at the airport, but she was being sent to hawaii on the chairmans orders she actually broke up with him over the phone and right after that the secretary took her phone away so she couldnt be contacted by the ML or even her own family. She ended up being away from korea for 12 years never seeing the ML or her family during that entire time while they were apart the ML desperately asked her friend and mother for her whereabouts but her mom told him to leave her alone because of the chairmans interference from what i remember the ML eventually found out she was in hawaii but the secretary immediately moved her to australia to continue her studies the twist is that the FL didnt know the ML was actually the one secretly sponsoring her tuition for her master and phd in london. After 12 years she finally returned to korea and went to jeju, where her mother was running a dumpling restaurant. Thats where she and the ML finally reunited she noticed the ML had developed some bad habits which she felt guilty about thinking it was her fault. Eventually, they got back together. Her mother found out they were being forced apart and there was also an issue involving the Fl father but the ML stepped in to help which finally earned the mothers trust. In the end they got married sorry if it's a bit messy thats all i can recall from the novel

I think she gonna be preggy and then run away after so many years they meet again and so after that...