Responses
Search for novel update. The spoiler is a bit complicated to open though. It's not really a spoiler but a rough translation of the novel made by someone. Although the process to access it is a bit complicated. I just read people discussing it on the forum in novelupdate.
https://forum.novelupdates.com/threads/positively-yours-%E1%84%8B%E1%85%A1%E1%84%80%E1%85%B5%E1%84%80%E1%85%A1-%E1%84%89%E1%85%A2%E1%86%BC%E1%84%80%E1%85%A7%E1%86%BB%E1%84%8B%E1%85%A5%E1%84%8B%E1%85%AD.107303/page-12
I was searching for spoiler because I can't handle the angst.
So it is Hae in of course. Her surveillance weakened because of the cooperation she showed to the nurse. After that she escaped and well we can see that she tried to hurt or heewon. Fortunately heewon and the baby is save.
Hae in got hurt too. And when she wakes up she will be jailed this time for sure because when her father once again plead with doojoon. Doojoon just said that he will be talking with his lawyer.
After that there's no more conflict except that heewon and her mother will reconcile.
And no more sad things again. Just a happy life with their daughter.