The gym was open 24 hours, so I decided to go late. It was 2am and I couldn't sleep. As I walked in I noticed how empty the place was. I figured I'd have nearly the entire gym to myself.

I walked into the locker room, and slowly unbuttoned my shirt. I looked around and saw that I was alone. So I pretended to do a strip tease, slowly unbuttoning my shirt and letting it slide off my shoulders. I was in the best shape of my life and hell, I was proud of my body.

Then I heard something. Someone else was in the locker room and had just bumped into the lockers. I listened and could head heavy breathing. I slid my jeans down. The sounds got louder. I could have sworn I heard a moan. That was enough to make my dick stir in my underwear. I slowly walked around the locker and peaked over to the next aisle.

I couldn't believe what I was seeing. There was my personal trainer, Laura, naked with three naked guys. And that's not all. She was sucking on one guy's dick, while the other fucked her. The third guy just stood between the other two jerking his cock over her back. They were too self absorbed to notice me and I was just in shock. So much so, I didn't even care that my erection stuck out of my underwear, or that I was now totally visible to the gangbangers. The blonde guy she was blowing had his eyes closed and his hands around his head. He slowly rocked into her mouth, his abs tensing with the motion. The other guy, slowly drove his cock in and out of her wet pussy. I was so into it, that I slowly began stroking my own dick as I watched. Then, the guy fucking her turned and looked me in the eye. BUSTED!

I looked right back at him, still jerking off. He smiled. Suddenly all the sex stopped.

Everyone was looking right at me. It was tense. Then Laura broke the silence with, "Well, don't just stand there! You want in or not?" The guys all chimed in. "Come on, man." "Yeah, dude, get over here!" I smiled as I walked over to them. I slid my underwear just under my balls, with my cock right by Laura's face. She looked at me with a smile. "Mark, this is Brad." Brad (the blonde one) put his hand on my shoulder. "Hey." Then Laura introduced me to Glen, the guy jerking off, and her husband, Steve, was the guy fucking her. "This is her anniversary present." He chimed in.

The next thing I knew Laura wrapped her lips around my erection and began sucking. It was incredible. The sensations she sent through me nearly knocked me over. I slowly fucked her mouth, as she hungrily devoured me. Steve and Glen stood next to each other jacking off. Brad came right up next to me and let his hard cock touch mine. I looked at him. He smiled. "Check this out." Laura quickly began moving from my cock to his, sucking and licking our engorged cock heads. I couldn't believe it, but the sensation of his cock and mine touching was hot. At one point Laura grabbed both are dicks and pressed them together, squeezing them both into her mouth. Brad and I each put an arm around the other, to keep from falling over. But only for a moment.

Brad and I each rocked back and forth as she went back to blowing each of us separately. She was fucking great! I honestly was worried I'd cum right then and there. Glen also moved in jerking it hard and rubbing his cock against her cheek. He, too, enjoyed an amazing blowjob from this slut.

Then Steve put his arm on Laura's shoulder. "All right, my turn." She sucked on his cock for a moment, but that wasn't what he had in mind. He sat down on the floor and guided his wife's pussy over his cock. She slowly slid down his shaft with a slight moan. She slowly rode him. He leaned back and let her body bounce on his cock. I stood in front of her, watching her perfect breasts bounce and jiggle. I noticed Glen and Brad were standing behind Steve, looking straight ahead.

I turned around and couldn't believe what was happening. I finally realized what had been going on. I could hear Glen chuckle as he and Brad jerked their hard cocks. Steve and Laura were still fucking on the floor looking straight ahead into. a CAMERA!

I couldn't believe it. I had inadvertantly participated in an amateur porno. It took a moment to register, then it really turned me on. Laura began to scream as she had an orgasm on her husband's dick. As I listened to her cum, I stroked my cock right in front of the camera, flexing my muscles in the process. "Don't blow yet" I heard Laura say. She sat up on her knees as Steve stood up. "Money shot, guys."

We all gathered around Laura, stroking our cocks. Laura pulled her hair back and opened her mouth. As I jerked my cock, I moved my free hand all over my abs and chest. I know my G spots. "Oh fuck!" Brad yelled. And with that, we all shot our loads, not waiting to take turns. Streams of cum, squirted from all sides all over Laura's face and tits. As we came, we moaned and screamed, all the while staring directly into the camera. We each kept stroking our dicks squeezing out the last of our cum.

"Nice work out guys. Now hit the showers!" Laura ordered. I followed Brad and Glen to the shower room. Laura kissed Steve passionately, then he too joined us in the shower. Laura got up all covered in cum, and stopped the camera. She packed it up and walked out of the locker room.

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