Mystery girl part 4

When my alarm clock finally went off, I was already awake for a while. I thought about if I should give myself some relief, before meeting the girl again. To clear my mind, but if the date went as I thought it would, I'd be able to get some 'relief' by her. I don't especially like masturbating, I always feel like it is a sort of 'waste'. In the end, I realized the girl never told me when to be there, so I panicked. My best guess was to just wait for her there.
I made breakfast, brushed my teeth and showered within less than half an hour, being thorough nonetheless. When I drove off to the park, I was nervous, thinking whether she was there already or if it was up to me to wait for her. Or if she'd show up at all.
When I arrived at the park, it was barely noon, the sun standing at her zenith in a clear blue sky. I sat down on a bench near a small natural pond and waited. Occasionally, I managed to catch a glimpse of some of the fish. I listened to the song of the birds and even spotted a lizard flitting across the path directly to my shoes. The sun wandered across the sky. It was getting later and later, and there still was no sign of the girl.
Then, when the sun started to kiss the horizon, I decided that I waited long enough. I rose off of the bench, but was pressed back down by a pair of hands on my shoulders. I wanted to turn my head, but the same pair of hands stopped me from doing that either.
Then her voice appeared close to my ear, telling me to not turn around. Her chest was pressing against my back as she leaned over my shoulder and undid my belt. All I saw of her were her arms glistening slightly, as if covered in a thin coat of sweat. But what I saw was not everything I perceived. Sure, it was exciting when her hands pushed down my pants a little, exposing my privates in this very public park. And it was sure exciting when her finger wrapped around me and began massaging me slowly. But what I concentrated the most on was the sensation of her hair on my neck, strands of it tapping my shoulder with every of her motions.
The scent of her filled my nose, the scent of sweat, salty yet sweet somehow.
Her breathing and panting got increasingly intense as her movement got faster and faster.
I knew I was close and I bet she knew too, but I was still conflicted whether I should say something. There are better first words than 'I'm about to cum'. It didn't matter what I thought. I was interrupted by the shooting sensation, the electric feeling, that is an orgasm. I shot my load all across the patch of grass in front of the bench. Some landed on my jeans as the last spurts toned down in ****. I saw how her finger wiped up what it could get before her hand disappeared behind my head. I closed my eyes and laid my head back. The girl meanwhile must've walked around the bench and squatted down in front of me, as I felt hands that were not mine close my jeans. Then she fixed my waistband or something and stood up. I opened my eyes again. She had taken a few steps backwards and it was obvious she was about to leave. Before I could say something, she put her finger on her lips and patted her right thigh. I didn't exactly know what she wanted but I saw stains on her leggings that look as if she wiped her fingers clean on them. Was that what she wanted to show me?
She waved me a kiss, turned around and started jogging away. Her whole outfit looked quite sporty. Training jacket, leggings and running shoes. I watched her until I lost sight of her behind some trees.