@Boobrie
If it was because he was stronger than her, than she should have already met someone that fits the bill before. As per my understanding of last ch., the chairman Gun-hee of the hunter association should be stronger than her. Additionally she should have been more alert about discovering a potentially unknown S rank that infiltrated their party.
@Uldar
If it was because he is a monster than she should have liked the smell of all the monsters she encountered so far. Or even better, him smelling nice should be covered by the boss smelling nice. Either way she wouldn't be in a daze but she should have tried to hunt him down like they did with his father.
And by the way, if she is a hunter and all hunters except him smell bad, than she should smell bad too. A smelly waifu.