Graveyard shift

I worked at a convenience store as a teen. I had to work at a different store one Saturday graveyard. I was on the register and the shift manager Tammy was in the back working the deli counter.
After the bar rush I was up front for awhile until it was totally dead.

I didn't see the Tammy and figured she was in the office. I faced some stuff and walked in the back room and she's getting spitroasted by 2 guy's I saw in the store earlier. She was kneeling on the desk chair facing backwards, hands gripping the back, a cock in her mouth while the otger guy was taking her pussy from behind. Her blouse was half open with her tits hanging out and they had a good piston motion going. She was facing away and didn't see me. The guy getting blown looked up and nodded. I got a nice view of her ass while she was getting fucked.

I watched intensely, it was so freaking hot. I stood where I could watch and keep an eye on the front door. Then they pulled out to swap ends and just spun the chair around. That's when she saw me and kinda jumped. I shrugged and she started blowing the guy but I could tell she was uncomfortable with me watching, so I went back out to the store. The guys came out after about 10 minutes and left. She got moved to my store later...