Girlfriends Accident

I was walking home from the local pub with my girlfriend and she was really drunk. She suddenly stopped walking and I asked her what was wrong. She said she was desperate for a poo and she was going to do it in her pants. I got an erection in seconds as the smell of her poo filled the air and I saw a lump in the back of her jeans and it was growing fast. Over the next two minutes the lump had grown from the size of a golf ball to the size of a gr**efruit and she was wetting herself. By the time she finished the lump had flattened out across her entire bum and her jeans were stained light brown from the mixture of poo and pee that had filled her jeans. I had a throbbing erection after watching her epic accident and when we got home I helped her clean up in the bathroom and afterwards we had the most amazing sex in the shower.