An older lady used me to fulfill her fantasy

When i was 29 i got into a strictly sex arrangement with a local lady who was 56. Every two or three weeks we would meet usually at her house and engage in great hot filthy sex. She was a bbw lady about 5 "6 huge breasts and ass, a big round soft belly and a big juicy pussy. She was dominant in bed and i would often have to worship her belly or her ass during foreplay often using oil. She would always have to ride my face before riding my dick. As she was riding me on her sofa one night drunk on wine she asked me between moans and gasps if she could do something new? I answered yes as if i could say anything else. As she slid up my dick she cocked her left leg to one side and farted. Just a small fart and immediately looked at me, i just laughed and as i did she let out a huge amount of gas out between her cheeks with a moan after then continued to ride me. The air was pungent with fart gas but itd didnt turn me off. She did three more big farts before we finished having sex. Afterwards she told me shes always wanted to do that. Her living room stank of fart.