the characters have enough nuance to decipher why she made her decision (in less than 50 chapters mind you)
i think the MC's parents ideologies not meshing with her own is another factor layering in this series of events .
If she chose the coworker it would fall in line with what the parents either wanted or done themselves (╯°Д °)╯╧╧
and im enjoyed evey bit of this ε=ε=(ノ≧∇≦)ノ