My ex's McDonalds farts

I(20M) and my ex girlfriend(20F) around two years ago got McDonalds and it destroyed her stomach, I'm more into mouth farting so those who are into sniffing, this is not the story for you.

For context, I told her probably first month about this fetish and she was completely on board. My ex is a 5'1" blonde, with a decently sized ass, not gigantic or anything. 

We went to McDonalds and she got a plain burger with a large fry and a coke. We went to my room and I honestly don't remember what we watched but knowing me, it was probably CxK or some bs on Netflix. 

We were cuddling on my bed and she tells me she has to fart, she was laying on her stomach so I just moved down and opened my mouth around her asshole, she was wearing black leggings and let out an airy puff into my mouth and asks, "did that taste good." And I of course said yes, her farts always had like a meaty-potato chip taste.

We went back to cuddling and I was rubbing her stomach as we cuddled when she said she had to fart again, same routine, I got down and opened my mouth and this time it was about 1-2 seconds long and it was literally hot, I almost coughed from the hot air entering my mouth. She played with my hair for a second before we went back to cuddling. 

This was like the first time she'd ever truly been gassy around me and I was in heaven. I was rubbing on her stomach and we were both grinding on each other and she told me she had another fart, when I went down I pulled her leggings down to reveal the leopard print panties I bought her and I sealed my lips around her asshole again. She let out a fart that quickly filled my mouth with air and said "swallow it." Her farts were just straight up like an old bag of lays potato chips and the taste was genuinely so addicting.

I started kissing on her neck and she kept grinding on me before she told me she another fart and I literally was so turned on. I went right back to her asshole and laid there for a second because it wouldn't come out, but when it did, my god, it was a huge sbd and it tasted like actual shit, but I did not give a fuck anymore, I took that shit like a champ. And kissed each of her cheeks and thanked her.

We were on the verge of having sex but she said she had ANOTHER fart, so I straight up asked her to just sit bare ass on my face since we didn't know if she'd ever be this gassy again. She pulled down her panties and sat on my face and I immediately sealed my lips around her asshole and I could feel her asshole bulging into my mouth as she pushed before finally releasing a 2-3 second long fart that almost made me gag. My cheeks puffed out and I'd never swallowed so much fart in my life.

I was caressing her thighs as she sat on my face and I could feel her pushing her whole weight onto my face as I ate her ass. I felt her pushing again and she let out this huge 4-5 second long fart and she just burst out laughing after, as I tried my best not to fucking throw up, regardless of how horny I was. 

She went to the bathroom after and we had sex, best experience I've ever had other than this short Red Robin experience we had a couple months after that I may write about if I get time.