Go out slowly and take the towel

I took the bait and decided to give her a show. I swam slowly toward the stairs, then, pausing a couple of seconds at every step, I gradually got out, watching her eyes but her gaze was pointing lower than my eyes. I paused even longer with the water level at my waist.
I took the finals steps, getting out of the water. Her gaze was lock on my cock, which was very hard from the attention it was getting. I took the towel, dried myself and discarded it. She was clearly surprised that I did not cover up and was quite distracted while we did the usual chit chat. I know my cock was slowly going down so I went right into the subject: “Do you like swimming naked?”
She paused before saying: “Never tried it.”
“Liar, I saw you earlier!”
“You saw me!”
“Well, I only glimpse part of you and I’d like to see more but yes.” She was turning red. “Why did you do with and why lie.”
“Because it’s embarrassing. I joined a dare website and that was one of the dare.”
“Did you enjoy it?”
“… yes.”
I had a flash. “If you want, I could be you are partner. Sometimes it’s better if you have a lookout or just someone there to help you if needed.”
She thought about it then said: “Ok but I need someone daring. So I’ll only agree if you do my dare, no matter what.”
I couldn’t pass the opportunity of seeing her naked later so: “Ok.”
“I dare you to masturbate to completion.”
Wow, she really went far! I couldn’t back out if I wanted to see her naked so I grabbed my cock and started masturbating. My cock was soon back to its hardest. I pumped very fast, not wanting to drag this out. Her hand slowly moved to her pussy and she started to rub herself. I noticed and I slowed down a bit. I saw her move her panties and a finger went in. I couldn’t see her pussy because of her hand and the angle but it was really sexy.
I sometimes watched her face for sign of orgasm and when I thought she was near and pumped like crazy. I lost it a bit while I shot my load but came back in time to see her orgasm. We catch our breath and I saw that I shot my load so far that I hit her leg. She also noticed and went to the pool to wash it but instead of just throwing water in it, she entered the water to just below her breast and then leaned down to rub her legs. This brought the water to her neck. When she came back out, my eyes were glue to her camisole which had become transparent with the water. I watched her magnificent breast through her camisole and had a big grin on my face.
“Ok, I’ll call you soon so you can assist me in some dare. Thank you for the little show, I really enjoyed it.” With that she left for her home.
I jump in pool to clean a bit then went to sleep.