Kind of the mid point it seems as the main plot points have been established. Slow start with a lot of tears but a mystery is heating up. What seems a little unusual for a K Drama is the grey shading for all the characters. Even the evil antagonist has some benevolent points, and the star protagonist, well she did kill a guy. The murdered guy had a moment of weakness but otherwise may have been an OK husband and father. The husband, the sister, the pretty boy and his girlfriend all have various and bad sides. Only the Halmoni is a saint. This was a John D. McDonald advice on how to write better stories. The last two episodes were heavy clip shows with many flashbacks. So the rest of the arc will be how the heroine turns the young man over and what really happened to the son.