During college one of my friends would collect some cash from everyone and rent a big portable hot tub in his back yard when his were away on holiday.
Mounted on a big trailer it was larger than average, I think we maxed out at 16 people in it once.
The tub would arrive Friday afternoon and once it was filled and heated the fun would start. A mixed crowd of half-naked college age guys and girls always made for a good time.
Saturday was always the big day, with more people than Friday. Some who had slept over on the Friday night and others who only came on the Saturday.
I was playing frisbee with someone in the back yard when Nicole walked in, wearing a baggy t-shirt and a pair of daisy dukes. She would look hot in anything.
She gave me a wave and put her spritzers in the first available cooler. Stepping over to an empty chair she kicked off her Reeboks and pulled off her t-shirt, giving her shoulder length blonde hair a toss as she dropped the shirt on the chair.
She always wore her button-fly jean shorts with the top button undone, so she slowly unbuttoned the rest of her fly and gave her hips a wiggle to drop them to her feet giving everyone a pleasing show. She flicked the shorts onto the chair with her foot and pulled a hair tie off her wrist. Raising both arms she pulled her hair back into a ponytail and slipped the hair tie around it.
Nicole was wearing a tight coral colored backless one-piece that showed a lot of sideboob and camel toe. She had been working out extremely hard that summer and looked amazing.
I'm sure she was aware that raising her arms lifts her breasts up and gives them added prominence on her figure. Her excited nipples pressing hard against the tissue thin swimsuit.
I had been staring at her too long I guess, because my friend who had the frisbee hit me with it on his next throw to wake me out of daze.
Nicole climbed up onto the hot tub and perched herself on the edge, putting just her feet in the water. Seeing me watching her she gave me another litte wave and a wink.
I was getting semi-aroused from all of this and decided to join her.
I climbed up to the tub and slipped into the bubbling water beside her. Slowly she lowered herself beside me, parking a hand on my thigh. I copied her and let my left hand rest on her thigh and she slightly opened her legs, resting the back of her knee on mine.
Slowly groping each other under the water, hidden by the rushing water, both of us were getting off. I was hard as could be, and Nicole was slowly and subtley rubbing herself on my hand with hers.
I leaned over and whispered "I don't think I can take much more of this."
"What do you want to do about it?" she whispered back.
"Head inside and meet me in the upstairs bathroom," I said, giving her pussy a final rub.
Nicole pushed herself up from the water, her suit clinging to her breasts like she was wearing nothing. She swung her legs over the edge, and climbed down to grab her towel.
I needed a couple moments to let my hardness subside before I could stand up so I sat there thinking about some of the formulas I had to memorize for my last exam. My erection wasn't completely gone, but enough that I could quickly climb out.
I wrapped a towel around my waste, quickly drying off as best I could so I wouldn't track a bunch of water inside.