Sit on me and Ride

I had a new student in the car today, a tiny blonde named Marilyn Sugar. Marilyn had only done two theory classes, so she was pretty new when it came to driving techniques. I showed her around the car a bit, the seats, the steering wheel, and the pedals. We drove along together and I tested her a bit, then pulled over so she could take over behind the wheel, but she was afraid. I told her we could do it together, she could sit on my lap, and I would work the pedals. We drove a little, and this excited Marilyn, and when we parked, I told her to grab the handbrake... but she grabbed my cock instead! Marilyn started to jerk me off, so I played with her tits as she rubbed my dick all over her pussy. She sat on my cock, I fucked her pussy, then she gave me a blowjob. I fucked Marilyn in the backseat, then pulled out of missionary position just in time to cover her with cum!