finished watching the subbed and i have so much to say but i'll wait until i watch tomorrow's too. [thankfully we have to wait only till tomorrow after this ending, IMAGINE WAITING A WHOLE WEEK! AGHH, thank you special episode to change the order of the episodes! ]
I also think that jieun must have given up Bareum for adoption. She must have been keeping a watch on him + when she saw him trying to bury the kid she came running at him. While rewatching the scene it felt like that could be a possibility.