Dude, I had the almost the EXACT same thing happen to me when I was 18... I also had a bright shiney red mustang that was loud, LOL.
I just happened to be at a fast food restraunt and saw her arguing with her boyfriend. She stormed off and started walking down the road. As I was pulling out of the place she flagged me over and asked for a ride. She wanted to go over to a friends house, I think it was probably a crack house, so I helped her. It was also in a VERY bad part of town. I dropped her off and she went in, did her business and then came out. She then asked me if I could take her by her house. She lived in a pretty nice part of town so I agreed. She also offered me a hummer, but I turned her down too
Then she told me to not forget her house, and that if I ever wanted to get that hummer or more to just stop by any time the white car was out front and she would help me out. I never did... I don't really know why either.
XR1stang