I really had to poo in my boyfriends car last night but there was nowhere to stop. He said I could do it in my knickers if I wanted to and clean up when we got home. I was shocked at his suggestion but also suite turned on by it. I told him I might have to if it got any worse and he encouraged me by saying I'd feel a lot better if I did. I kept telling him how bad I had to go and knew he was enjoying my desperate situation by his erection. I then told him it was no home and lifted myself off the seat to make room for it to come out. I then pushed my poo into my knickers and it was a huge load and a huge relief. My boyfriend got so horny he came I'm his pants and I saw the wet spot in his jeans.