So Hye Jung is a witch who can't see anyone happy not even her own son. Spoilers! *If the subs were correct, she thinks she can own him and interfere however she pleases in his life because she's his mother. If she's his mother for one thing, shouldn't she be for other things too? Like you know, not making him miserable since childhood and Not blame him for how her life has worked out. **
Yoon Hee saw the picture in Ha Na's camera and it all clicked. Joon's anger, Ha Na's misery, and In Ha's pensive moments followed by their break-up and as we all thought she felt horrible for her daughter and felt it deep in her heart that the "kids" were going through that too. She even thanked In Ha for breaking up with her. **
Hye Jung, apparently, it's not enough for her to just know the wedding has been cancelled. She needs to know why and just why Joon is the reason. I loved how Yoon Hee basically and in more eloquent and thoughtful words told her to mind her own business. Hye Jung also called In Ha "pathetic", which I thought was very ironic. And she didn't see them on the bridge at the ending of ep. 16/beginning of ep. 17, but she did see Ha Na in the building that used to be Joon's house and of course put on her witch face and demanded what was she doing there.**
Joon went to see Yoon Hee, possibly to tell her about Ha Na and him. Since those two can't seem to talk to their parents. Ha Na went to see In Ha (neither Ha Na nor Joon know the other went to see the other's parents). But when Joon saw Yoon Hee she was blacking out again and just thanked him for helping her pick up something (she couldn't see him well) which he must have found weird (by the look on his face) and by the fact that she didn't ask what he was doing there. **
The fluffy moments were nice. I don't mind the mushy moments in this drama. <3