Cwm Pooping Tied Up Losing Control

Im wearing a pair of blue leggings and a grey vest, tied up lounging face down on the floor. My mitts and feet are roped together, severely limiting my options as I get more and more desperate to go and poop. I resist for as long as I can, struggling and straining in a desperate attempt to avoid shitting myself. Unable to escape, I eventually lose control. Poop visibly explodes into my tight blue leggings, leaving a bulge that smears, spreads and squishes across my ass as I try and wriggle .