I saw dark-haired beauty Billie Star walking down the street today, so I stopped her and asked if she would like to be part of an experiment for the university. I paid her some money to flash her tits and ass at passing cars, then asked her if she wanted even more cash. We went off to an underpass and I paid Billie to suck my dick. My big cock made her horny, so Billie let me fuck her wet pussy, then stroked me off until I came on her face!