My girlfriend likes to dominate me by refusing to let me go to the toilet until I'm desperate to go. Yesterday she made me hold my poo all day and by around ten o'clock I was busting to go. I asked her if I could go to the toilet as I was getting desperate but she said no and if I had an accident in my pants I'd be in big trouble. She said we were going out for a walk and I begged her to let me go to the toilet first but she refused to let me go and I was forced to hold it while we walked around the local streets. I was soon bursting for a poo and I pleaded with her to turn back home as I was about to poo myself. She got mad at me and warned me not to even think about doing it in my pants. As we walked she said she was desperate for a poo and she was going to go in some bushes that were nearby. I asked her if I could join her but she said no and I had to watch her relieve herself while I tried desperately not to go in my pants. She teased me with her sighs of relief knowing how desperate I was and I begged her to let me go when she finished. She just smiled at me but she didn't answer me. By the time she finished I was fighting a battle with my bowels to keep my pants clean and my girlfriend took her knickers off and wiped her bum with them before dropping them onto the pile of poo she'd made on the ground. I couldn't hold my poo any longer and when I told her I was going to poo myself she called me a dirty little boy and if I would have to be punished for it. I totally filled my pants and it was such a relief I didn't care about the consequences.