Every step I took was pure agony. I felt that horrible airy pressure in my stomach that was a sure sign that the poop crammed into my rectum was blocking the way for my gas. I was certain that if I tried to fart, I would poop myself. Nevertheless I continued to hobble down the sidewalk towards the grocery store with Aidan, getting more desperate by the second despite becoming closer and closer to sweet relief.
I felt a light but powerful pressure on my asshole as a fart tried to squeeze its way out, but I was certain if I let it I would fill my pants. As soon as the pressure on my anus started to dissipate the pain in my stomach became much more pronounced. I stopped and clenched my stomach, trying to be subtle so Aidan didn't notice what the problem was. I managed to force the pain down and keep walking with my pants clean.
Finally, after what seemed like an eternity, we got to the parking lot. I immediately was relieved, I wasn't going to poop myself, I'd made it. But through my relief, I felt something else too, this time a heavy solid mass trying to force its way out of my ass. I clenched tight for a moment then followed Aidan into the store and headed for the ladies room.
After Aidan peed I went into the stall and locked the door. After wiping the seat off I turned, pulled my pants and panties to my knees, and sat on the seat. I waited for Aidan to give me some privacy but she clearly had no intention of doing so. So I was left stuck on the toilet with this horrible pressure trying to force its way out of me, and I couldn't go. Even though I had to poop and I was sitting on the toilet I couldn't do it with Aidan there.
Suddenly, my stomach cramped up, hard, and I felt I may not have a choice but to go ahead and go. I managed to force my movement back painfully, and considered how ridiculous the situation was. Sitting on the toilet and holding my poop in.
Finally after ten minutes that felt like an hour she said she was going to shop and left.