Carly came to her lesson all dressed up for me! I told her there was no need to look pretty for a driving lesson, but to be honest, the sight of the busty blonde in a tight top and pencil skirt made my dick hard. I must have started touching myself because Carly stopped her practice test to yell at me for having my cock out! I was mortified. This is it, I thought, I'm sacked for sure! Carly said to prove my dick wasn't hard by taking it out of my pants, so I did it, knowing I'd be caught. Then the cheeky blonde suggested we do something with my erection. I was a bit shocked but more relieved. She pulled out her wonderfully massive tits and got to bobbing on my big dick right there in the front seat. The naughty bird had pierced nipples and was covered in tats, so maybe she wasn't the fairy princess I had thought. She rode my cock in the front seat right there in the parking lot, in full view of anybody, then squirted pussy juice all over the car! I wonder what my wife will say when I come home with makeup on my trousers...