I tried to hold my pee for a while but then my bladder gave up. Pee gushed out, drenching my pullup, until it started overflowing and dripping down my legs. I couldn't stop peeing so just let it all out with it leaking over the sides of my pullup. It was soaked and hot and swollen and pressing against my pussy, so I couldn't resist touching myself until I had an INTENSE orgasm.