I was working out in the gym, on my own for once, and there was no one else there. It was only a small gym, with limited equipment, as it wasn't the main gym in the hotel. The main one was on the ground floor, this one was on the top floor, and was normally only meant to be used by staff, but because of the publicity surrounding S Club, we had been given permission to use it.
Tina walked in while I was on the running machine. She was in a blue bikini. She walked over and said hello, and I replied politely. She then walked over to one of the leg muscles machines. I stared at her ass, as she walked away. It was a fine ass. She was on the machine, which involves pushing her legs apart. I watched her in the mirror, hoping that she couldn't see the bulge in my trousers that was appearing.
I slowed down my walk and thought of things to get my penis to go down, not wanting to show Tina my rock hard member. Finally she stopped and went into the changing room. I stopped my walk and lay on the bench press, and began to build my muscles. My penis was still semi-erect, but it was no longer an issue with no one else in the gym.
I didn't notice Tina re-enter the gym, and neither did I notice her creep up between my spread legs. However I did notice her presence when she put her hand straight on my crotch, and said:
"You got a good view then!"
I dropped the weights, with a clank.
"I'm sorry...." I began
"Don't be!" She cut in, "I am glad that I can do this to men. Anyway, your tight ass was having a similar effect on me!" As she said this, she took my hand and put it between her shapely legs. She was wet, and it wasn't sweat.
She walked away, but continued to talk. I sat up, partly to conceal my hard-on, partly to see her ass and legs.
"Hannah and Joe have been talking about what a great 'personnel trainer' you are, and I had to see for myself" She had reached the door. I thought she was gonna leave, but I was wrong. Instead she locked the door.
She walked back over to me.
"Now we have some privacy," she said, "you can show me how great a 'personnel trainer' you are"
She quickly positioned herself and straddled my legs as I sat up. She sat down on my lap, and kissed me deeply. I returned the favour, and we sat there for a while, exploring each others mouths. Gradually, our hands began to roam each others bodies. I kneaded her firm ass and shapely legs, and she ran her hands through my hair. She grabbed the bottom of my t-shirt and pulled it over my head, temporarily braking the kiss. Admiring my body, she licked my chest before we began to kiss again. Now, I was fumbling with her back, and in the process, untied her bra. It fell off her front. Her tits were larger than Hannah's, and similar to Joe's in size, but they were much browner.
Obviously Tina bathed topless. My mouth immediately went to her nipples, flicking over the top, and jumping from one breast to another. She began to moan in pleasure, but at the same time, began to remove my shorts. I sat up, so she could get them off, leaving me in a pair of boxing shorts. However, she was quick and managed to get these off as well, exposing my 10" cock, hard and upright. I released my grip on her breasts, and saw her staring at my 10" monster, smiling. We began to kiss again. I used one hand on her ass, and the other on her breasts, while she used her hands to play with my dick, and raked her nails along my front.
I began to undo the bottom part of her bikini. As I did, she stopped kissing me, and began to nibble my ear.
"Fuck me!" she whispered, "I've never had one that big, Fuck me Please!"
I pulled her bikini loose and threw it away. I looked at her. Her muff was a small rectangle of black hair. It was very enticing.