I was walking in the woods with my mate Lisa when I had to poo really badly but I was embarrassed to tell her. I was getting desperate and after a while, Lisa said she was desperate for a poo. I admitted I was too and Lisa said she was nearly pooing herself. I said I wasn't sure how long I could hold it and the next thing I knew Lisa winced and a look of fear on her face told me she was about to have an accident. I smelled poo and the look of fear turned to relieve as Lisa filled her knickers. She peed herself as well and I could see her knickers sagging under her skirt. She apologised for having an accident but I said it was OK because I was about to poo myself too. I pushed and it felt so good to be pooing myself in front of Lisa. She liked the show and when I was finished we swapped knickers and walked home hand in hand feeling very horny.