You’d never know it to look at her, but my girlfriend is really into sex.

Tina dresses very conservatively for her executive position at an investment firm, but when she comes home, the tailored suits, white blouses, upswept hair, and librarian glasses come off.

She knows I have lots of fantasies about her doing some guy in her no-nonsense attire while I watch. I’ve begged and pleaded with her in vain to give me this one thing. But last week for my birthday, she told me she wanted to go out to a new club she’d heard about. I agreed, figuring we’d have a few drinks, dance a little, then come home and screw.

On the day of my birthday, Tina called from her office and said she had to work late. She didn’t want me to sit home waiting for her, so she gave me the address of the club and told me to meet her there at 11:30.

When I arrived at the club, the place was packed. I had no idea how I would find Tina. I inched my way through the crowd, checking out the bar area first, then making my way over to the dance floor. If Tina was there, she was somewhere in the middle of all those writhing bodies. I walked the perimeter of the floor until I spotted Tina. She wasn’t alone.

Tina was blissfully mashed between two big guys, both of them grinding against her. I didn’t think she’d hear me over the music, so I just watched as the guys dry-humped her on the floor. Her crisp white blouse was halfway unbuttoned, but the rest of her business attire was gone. She had on a short skirt, no stockings, and mile-high heels. The look was pure after-hours Tina. Just the sight of her rubbing up against two strangers had me popping wood.

Suddenly, Tina looked directly at me and mouthed the words, “Happy birthday,” as she shot me a grin filled with mischief and lust.

When the song transitioned into another bass-thumping beat, Tina led her partners off the floor and toward the back of the club. I trailed them to a dark corridor that led past the restrooms.

I watched as Tina handed one guy a condom while kissing the other. The rest was pure magic. Tina started giving one guy a blowjob, licking and sucking his cock, while the other got on his knees and began to eat her out. My cock was painfully hard behind the confines of my jeans. As much as I was dying to pull it out and stroke it, I didn’t want to miss a single second of this live porn show, so I just rubbed my dick through my pants. Then I pulled out my phone with my other hand and started filming the action.

Tina stopped sucking cock long enough to say something to the guy with his tongue up her twat. He stood up, rolled the condom onto his dick, then pushed into her from behind. When he was balls-deep, Tina went back to blowing the guy in front of her. It was un-fucking-believable, watching her get tagged at both ends by these guys. One had her by the hair, shoving his cock deep into her throat, while the other pounded her from behind. Tina looked like she was really into it, clutching the guy’s ass as she hollowed out her jaw to accommodate him.

Tina knew how much I wanted to see her like this, but after asking so many times and being told “Not in this lifetime, buddy,” I never thought she’d agree to do it.

I knew the exact moment when the guy she was blowing came. He jerked hard against her mouth, and I saw Tina trying to swallow his come. She got most of it, but some trickled out the side of her mouth. When the guy reaming her pussy came, both Tina and he yelled loud enough for me to hear over the music. And that did it for me. I came hard, soaking the front of my jeans as I leaned back and slid down to my knees, my phone falling to the floor.

That was the only time Tina indulged my fantasy, but I have my little film, and Tina delights in telling me how it felt whenever we screw.