Sauna Surprise

I thought I had already posted this story when I posted my last one but turns out I hadn't. This happened a couple of years ago when I was 17. We (Kara, Abby, and I) used to go to this female only gym near where I lived. We had heard stories of wild happenings there, but had never witnessed anything. I was there alone on a relatively slow evening and had ran a few miles on the treadmill and done a little bit of upper body weight training on one of the machines. My muscles were a little achy and I decided to stop in the sauna before hitting the showers. I walked into the sauna carrying a towel, but not wearing it. There was a single woman in the sauna already and she pulled her towel up to cover herself when I walked in. I didn't think much of it. Some people are shy even around others of the same sex. I've never minded being naked around other women. I went back to the far corner and laid my towel down and stretched out on the bench. The heat felt wonderful and I just laid there and closed my eyes and may have drifted off a bit before a noise got my attention. It wasn't such an odd noise. I'm not even sure why I noticed it, but the lady sitting five or six feet away had let out a little sigh. I opened my eyes and glanced over at her. She had let her towel down and I could now see her breasts, but she still had her lap covered with the towel and she gazed my way as I looked her way and we smiled at each other and then went back to our own little worlds. I laid my head back and then my tired brain finally caught up with what my eyes had seen: one of her hands was under the towel that was covering her lap. I almost didn't believe it so a tried to sneakily crack my eyes open to look again and this time I caught her looking at me as she was moving her hand under her towel. I was pretty turned on by the thought of her rubbing while checking me out, but I also didn't want to interrupt her. After a minute I decided to adjust my position both to give her a better view and to get a better one myself. I rolled over on my side and readjusted my towel under my head and then closed my eyes and laid there like I was dosing a little again. The position I was in should have given her a nice view of my tits and bit of my pussy as well. After a few minutes like this I slowly opened my eyes and she was so intent on what she was doing she didn't even notice. I watched her hand moving under her towel for almost a full minute before she realized my eyes were open. She saw the grin on my face and smiled back weakly. I sat up and spread my legs open and reached down to touch myself and her eyes nearly popped out of her head. After watching me for a minute she pulled the towel off of her lap and gave me a better view of her. She had a nice body. Was probably in her mid thirties and judging by a few stretch marks she had had a kid or two. Her breasts were at least a C if not a D. She had a nice neat patch of fur between her legs. I watched her rub her clit in circles as I did the same. She stared at my hairless little pussy as I slid a couple of fingers inside of myself like a man dying of thirst watching someone pour out a bottle of water. It didn't take very much of this before she started spasming with the beginnings of a powerful orgasm. After she came she just sat back and watched as I got myself off as well. We left the sauna and showered without saying anything to each other. I saw her getting into her car as I was leaving and waved at her. She blushed and waved back but didn't stop to talk as she drove past me. I have never seen her again. I like to imagine she was some bored soccer mom who was too scared to come back to the gym because she was worried her bi-curiosity would get the better of her.