This is an odd mini-show. There are so many things that are unrealistic, that the show ends up being a waste of time.
Spoilers!!!!
One is that FL manages to raise a child for 5 years without ML knowing it is his - and FL doesn’t tell him even if she marries him. Then she suddenly needs 3 mill for an operation for the kid and her love rival cuts her off so he dies. Only one month later she is fine again (as in not grieving) even if she also has a miscarriage with the second child of MLs she is carrying when she loses their first child. And the 2ML moves in and occupies her couch! Don’t get me started with the fact that 2ML somehow becomes a child by carrying FL on his back for a long distance!! By the way he is faking it to get FLs sympathy.
Character wise we get this FL who waits until the very last to tell ML what really happened. A lot of her suffering and both her children could have been saved if she just told the truth from the start. We get this ML who misunderstands FL and treats her like shit to get some kind of revenge. In some ways I understand why he feels the way he does but the way he handles it is immature and abusive. 2FL is a classical gold digger like so many other women that sets their eyes on marrying into a wealthy family.
Acting wise this is definitely not top shelf but it’s not that bad.
Anyway, if you want a “no-brainer” story that has a nice ending, this is ok. Otherwise just find something worth your while.