An early evening outdoor adventure with [m]y FWB [public]

A conversation I was having a little while ago reminded me of this evening. Sorry for the wall of text, but that’s how I write.

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A couple of years ago I was out at night with a long time FWB (she was more than a FWB really, but that’s another story), and we were walking a man made path around a public reservoir or something like that. About a 1/2 mile loop all the way around. The pathway was dotted with modern but old looking decorative lamps, offering not a lot of light – just enough to give it a romantic feeling. Just off the path there was grass, then some bushes and trees. A little bit of quiet in a city. We weren’t alone there, but it wasn’t busy either. Every couple of minutes we’d pass by someone, another couple on a park bench, a jogger passing us, etc. We’re talking, holding hands, flirting, becoming gradually more sexual and generally teasing each other for what each of us thinks the evening will bring. About 2/3 of the way around, I take her hand and lead her off the path. We go through the grass and off to where the trees are – maybe 30 feet from the walking path. She was following eagerly, she and I had shared quite a few outdoor adventures together. I pressed her back against a tree (her back now essentially to the water with that tree and a couple others between her and the water) and we start kissing, and making out, hands everywhere at once. She was wearing a summer skirt and I quickly removed her panties. I turned her around and made her place her hands on the sides of the tree. Not hugging it, but the sides. I had planned on this walking location, and the idea that was in my head. I took a short length of rope from my pockets and tied her wrists separately but around the tree, so that she couldn’t pull them any further back than about half way. She allowed me to do it, she liked being restrained and teased in bed, etc.