This just happened and I figured I'd share.
I had been extremely horny this morning wtih a thousand things to get done. I figured a quick stroke session would be sufficient. Well, it turned out to be a little longer than planned and before I knew it I heard my roommate come home for lunch. I stopped my activity and went and chatted her up for a bit before heading off to get some errands completed.
The last place I stopped at before heading home was the grocery store. While inside I continued to get erect. It would subside for a bit before seeing an attractive woman...fantasizing about her and becoming hard again.
After loading the groceries into my car with another erection I scanned the lot noticing there were very few cars parked nearby.
The only vehicle near me was a short empty transit bus(shuttle) which was parallel to me and a few spots over. Thinking I could rub one out quickly without notice, I undid my fly and zipper, pulling my pants down a short way to allow easy access and comfort.
I have vaseline in my glovebox...yes, I have jerked off in my car before. I brought out the vaseline along with some extra tissues I keep in the car as well and lubed by hard cock. I'm average in penis size, have a nice build and have been told several times that I'm an attractive man. I leaned the seat back a bit for added comfort and began to jerk off.
If I would have had my music on I never would have heard the door of the shuttle that was parked nearby, close. 'Oh shit!' I thought. turning my head slightly to the left I could clearly make out one of the women that I had secretly fantasized about while in the store. I thought about stopping or covering up but was surprised when stood up and and began peering my way. At first I wasn't sure if she was watching me or not because I turned away, pretending not to know that I didn't know I was being watched.
My heart was racing as I continued to stroke my lubed cock while being watched by this pretty lady. I shifted in my seat a bit to the right and lifted up a bit to give a better show. It didn't take long before I was near orgasm. I have always been a heavy shooter and was about to reach for the tissues when I decided to just go for it. I started to unload, spurting all over my chest and even one streamer falling across my face.
After my bindblowing orgasm, I sat up a bit and reached for the tissues to start to clean up. It was then that I looked around the parking lot as if I was making sure no one was around. When I looked in her direction I was pleasantly surprised to see her standing on the stairs of her shuttle(perfect birdseye view) facing me with a large grin on her face. I was still aroused but extremely embarrassed by my actions as well and began to blush as I wiped the cum from my face and chest. As I zipped and buttoned up, I looked over to see her on her phone, laughing with whomever she was talking to. I panicked a bit and got out of there quickly. Wish I knew exactly what she saw and what she was thinking.