Mistress Dula was dealing with a brother in law who wanted to fuck her. She chose to fart on him after she had teased him and left him high and dry. He had to smell her farts and he was lucky that she did not choose to shit on him or do something worse to him like crush his nuts with her high heels. He got the message and he stopped pissing her off.
Mistress Dula wanted to interrogate this guy and she tried but he did not respond the way she wanted. She was getting pissed and fed up with him that she decided to humiliate him and teach him a lesson he had never witnessed before. That is why she chose to cruelly fart on him and choke him at the same time. That way, he would never waste her time again.