This show man was frustrating at times but soo good.. was getting tired of the sick daughter plot but in the end, it became one of the key points and it became a tearjerker in the end. Man, I am so glad that mother-in-law got what she deserves and everyone's speculations were correct the bodyguard this whole time was her older son and only son. The son that was married to Eun Su was her adopted son and she didn't want that to be found out in the end. In the end, the truth came out Won Joo found out her mom was Eun Su, she even already knew she was adopted but didn't want to say anything. The ending was so beautiful and pure.