The bonuses are awarded at the boss' discretion. If s/he didn't like her, there would be a bias against her. It's no different in social circles, discussion for

The bonuses are awarded at the boss' discretion. If s/he didn't like her, there would be a bias against her. It's no different in social circles, discussion forums, etc. it's not necessarily performance or knowledge that gets the kudos. So, it's very likely she was being overlooked because the boss didn't like of respect her. I am making no comment or judgement on her.