On the bus

I was 18 years old attending my last year at high school and I had to ride on urban bus for at least 1 hour each morning from my town to the big city. The bus was always full of k**s like me going to school, workers, and middle aged women going to work daily as housemaid for rich families in the city. I wasn't really attracted by those older women until one day when on the rush to get close to the bus door to exit at my stop, I found myself behind a 60yo woman. I knew this woman she was getting out of the bus at my same stop, she was a bit plumpy and always talking with other people. But back to the story I was just behind her, it was the day of gym practice at school so I had just loose shorts, with the crowd in the bus I started to feel my body touching her...it was hot feeling and suddenly my dick started to rise inside my gym shorts. I was worried she might complain but she didn't say anything, so my stiff dick started to get even more hard until I could feel my dickhead pressing her soft and big ass. Still not a single move from her, so I got bolder and being shielded by the crowd around us, I quickly pulled my shorts a bit down. In that way I had my cockhead out still pointing up, so I just leaned close to this lady ass and started touching her skirt covered ass with my bare dickead.
She must have felt this as she suddenly turned her head and glanced at me, this gave me more courage to touch her so my movment was stronger sliding my now half out dick into her ass cheeks covered only by her light skirt. Then the unexpected happened, she put her hand behind and started fondling my bare dickhead, then she moved to the whole cock and her fingernails caressed my balls.
It was too much for me, I started to shoot my semen on her hand, her ass and her right leg, I saw her taking her cum covered hand and quickly bring it to her mouth licking my semen. I can never forget this encounter, I had many others with the same woman, but this was for me the first and most exciting one