Goddess Nika was on her period and she was not going to fuck this guy. In any case, even if she was not on her period, he was not her type and he still would not manage to fuck her. So she took that chance to humiliate him and have fun at his expense. So she teased him and made him jerk off to her instructions and he was so into what she did to him that he did what she asked.
Goddess Nika wanted to conduct a little experiment. She was giving jerk off instructions to this guy and she knew he loved everything she did. She was sure he would cum in a few minutes if she continued to do what she was doing. So she farted to see whether it would affect him or whether he would go on jerking off and not pay any attention to her farts.
Goddess Nika humiliated this guy for her own fun and enjoyment and when she was done doing that, she got the poor guy to jerk off and told him that that was her way of repaying him for being a good sport. She gave him jerk off instructions and he loved the naughtiness behind them and how she teased him. She followed the instructions and she came nicely forgetting what she had done to him.