Jacking off in Public

I was sitting in the car one day because my mum had taken my sister in to get a hair cut. I was bored out of my mind when a car pulled into the park next to me. I looked down(my car in a big 4 wheel drive)and saw this hot blonde chick. I was amazed I could see straight down her top, she wasn't even wearing a bra. she hopped out of her car, she was short so I was still kinda looking down on her and I believe that she must've known this because at that moment she turned towards the car and pulled her top outwards and I could see her large round tits and her erect nipples. she fixed her hair in the reflection and walked away leaving me as hard as a rock. before I even though about it I had my 8 inch cock out and was stroking in like mad it wasn't long before I came and rope after rope of cum shot out of my dick. I was sitting there exhausted when there was a knock on the window I looked over and the hot blonde chick was standing there smiling she hopped into her car and then started massaging her boobs. then she moved her hand down into her pants and it started moving frantically, she began to shake and I could hear her moan through the window. she shuddered and I guessed that she had come.....she then readjusted her clothes and started her car. but just as she was about to drive off she mouthed at me 'now we're even'.......i have had many jack off sessions after this thinking about this one time.