Brad has some fun with the slider

I began to feel less dick inside me.

"Wait a minute, what gives?" I said, surprised at how annoyed I was by not having a cock distort my flat stomach anymore.

It still felt incredibly strange to have the thickness and length change inside of me without any motion or active fucking, even if the feeling was a reduction.

Kyle just moaned behind me. I guess for him it just felt like pulling out, even if he wasn't actually moving.

I started to gather my thoughts so I could tell Brad to quick messing around, but he beat me to the punch. I saw him begin swiping left and right over and over again.

If I thought I was feeling full before, this cleared up any doubts I had that I hadn't felt anything yet. I watched (and felt) as Kyle's dick started growing again, and being held firmly in place it just started bulging my stomach again. I would have loved to see my own expression as I watched the bulge grow larger as it continued to spear me. Just when I thought it couldn't fit any further, it came to a rest, just a little below where I figured my rib cage would be if any of this made any sense.

That was about as much as much brains i had left to think with, because the rest of me was filled with lust and pleasure. And then just as quickly as the cock bulge reached my midsection, it started going back down. This time, only in length, the girth seemed to remain as insanely thick as it felt.

"Oh my fucking god!" I heard Kyle say as his grip on me tightened.

What happened for the next five minutes was me firmly held tight in Kyles lap, as his cock grew and shrunk in size into my guts. The room filled with our moans, as we both sat there and received pleasure. I don't know if Brad got tired of swiping or if Kyle had reached some new limit, but Kyle moved his hands to my hips and started moaning louder.

The size changing cock stopped changing as it grew again, bulging wildly out of my stomach. I knew Kyle was close, so I started rubbing his dick through my skin, giving him a hand job while it rest in my belly.

"Oh fuck, oh fuck" Kyle kept saying, and I could feel a pressure building inside me of my own, as the overall experience started to overwhelm me.

And then Kyle howled, and I felt him start to buck and shake beneath me.