Earlier today, my girlfriend Lucy and I decided to go to the local mall, but I had other intentions. I had decided to play a little trick on Lucy:) soo while Lucy was still in class I made a box of brownies, but i through in a secret ingredient. I also threw an entire box of chocolate laxatives into the mix. When Lucy finally got back I asked her to try one of the brownies. Despite being an entire box of laxatives inside of the brownies, they were delicious. To not seem conspicuous and also partake in the fun, I also ate a brownie. The brownies were so good Lucy went in on seconds, and after she finished we left for the local mall. We made it there within 20 minutes, and scrounged the parking garage for a spot to park. Once we finally found a spot to park, we both walked into the Borders bookstore near the entrance. After another 15 minutes, I could feel trouble brewing inside, and I could tell Lucy was in the exact same boat. After a couple more minutes of shopping, Lucy told me she was desperate to use the bathroom but I begged her to do it into her pants:) Lucy was hesitant though, and didn't want to embarrass herself in a public place. I tried to reason with her, "Please Lucy! If you poop your panties I will poop mine!" After my convincing argument Lucy agreed, and while in one of the isles in Border, Lucy crouched down and started to grunt. Lucy was wearing tight hollister blue jeans and you could see the mess pouring into her panties. The laxatives really worked becaus Lucy's mess was enormous. There must have been three pounds of soft poop sitting inside of her panties. After almost ten minutes of pooping she stood up and told me it was my turn. So I did the same thing, I was fortunate becuase i was wearing a diaper under my yoga pants. I crouched down and started to push. An explosion of wet and soft poo started shooting into my diaper. The flow seemed to be neverending and my diaper was completely filled both pee and poop the end. I felt so naughty pooping my diaper in the store, it immediately turned me on. So I talked Lucy into even more fun, we decided to have sex in the back of her car. I played with the mess in Lucy's panties and spread it all over her. There was so much poop in her pants that it had completely ran down the back of her legs. It was an amazing experience.