When you have an ass as good as goddess Nika has, you have to use it to your advantage. That is what goddess Nika did and she loved the fact that she was able to tease and flirt with it to the point that she was able to hypnotize guys with it and then take advantage of them however she pleased. For some, she wanted favors, some she wanted info and for others, she wanted access.
Mistress Harley knew this guy was the one who had the final say on whether she was hired or not. And she did not wait for him to make that decision independently. So she used her femdom hypnosis prowess to get him to do things that she wanted. Being hot and naughty, it was easy for her to get him to hire her without him knowing he had done so under her influence.