Sshhh!

Me: Sshhh!

I place my hand over Abby's mouth and stop thrusting immediately as the new arrivals enter the changing room. I strained my ears to see if I could make out what they were saying but couldn't really make anything out.

Meanwhile, Abby moved her head to peer through the crack between the door and the cubicle wall. Making sure we were as silent as possible.

Me: what are you doing?

Abby: Tell me you wouldn't if this was the girls changing room?

Me: oh

It suddenly clicked that she was trying to peek at whoever just walked in. I probably should have felt betrayed, but she had a fair point. I would want to do the same if our places were swapped.

Abby: hmm, I can't really see. Let me see if I can get a better look.

To my surprise, Abby actually opened the door a little. Moving back into our now smaller cubicle, I felt my still hard cock slide further into her sending a tingle of pleasure through me.

Abby: mmm yeah... now I can see a bit.

Me: What can you see?

Abby: Nothing interesting yet. He still got his gym clothes on.

Me: careful he may see you

Abby: it's fine; he is facing the other way. I cant see his face, so he won't be able to see mine....ooo now that's what I am talking about

I felt Abby start to slowly move her ass up back and forth along my shaft as she continued to watch.

Abby: This is so hot...mmph

Abby: His rear is almost as nice as yours, skinner legs though

Abby continued to silently fuck me in contrast to the sex we were having only a moment ago. This was equally as intense but for entirely different reasons.

Abby: Mmm yeah, turn this way just a little... a little...more

I started to move with my own thrusts now and reached round the squeeze and tease Abby's nipples. They were as hard as diamonds, and so was my cock.

Abby: Uh...uh... Oh my god...I can...I can see his cock... shit, he's coming this way.

Quickly pulling ourselves back into the cubicle, I found my back on the wall and Abby now completely impaled on me. Abby involuntary began to shake, letting out a loud moan. I put my hand back over her mouth to stifle it, but it didn't stop the orgasm coursing through her body. It took all my willpower not to cum myself for what felt the longest orgasm Abby had ever had.

We stood in silence for a moment. I couldn't hear the stranger moving.