imo this was how I expected the drama to end. as many people are a bit disappointed with the main couple are still not official yet but the thing is ml got his closure from his previous marriage in ep 11 and the fl has a small crush on him but never actively pursued him. both of them are emotionally mature. you can't really expect them to suddenly fall in love, but the ending can be interpreted as they are on their way to 'love'.
So could she actually be both mother and sister?!
otherwise this would've been a gem for me