Chrollo's sweet n sour cum's Favorite

I just found out the Blondie girl will get married to jinwoo and this the plot is getting out of nowhere for some reason, first of all a romance out of nowhere secondly them getting married in future thirdly */?they'll have a child and the power sung jinwoo holds will get passed/?*(I dont know if them having a child is true) and for me the plot is just getting ruined because of the romance idk why, it's just it's getting wrong *my opinion btw* :/