Huge

She said it was a joke, but I didn't think it would get this out of hand.

Yesterday she told me to come over in the morning, so she could show me something that she saw online.  When I arrived she brought me up to the roof, where she pulled out a large gas tank and a hose with an elastic loop around the end.  She urged me on to put the hose in my mouth, the strap keeping it in place, after which she would fill me with gas.  As a joke, she repeated.  I thought it was strange but it seemed innocent enough, so I did as I was told.

Hours later and I ended up like... this.

I'm upside-down and it's hard to move my head for how swollen my neck is, but from what I can see the entire city is under a shadow, and it's all from me.  My chest is just a smooth curve stretching out in front of me, a horizon so large that I can't even tell how big I've gotten.  It must be at least into the upper atmosphere, since I can feel cold air on my feet and backside.

Every so often I can feel a tension all throughout me, and my body lets out this terrible groan like I'm finally reaching my limits.  But each time there's still some more give and I keep stretching, the sudden throbbing growth stimulating me so much that I come, harder than I've ever come before.  All the while she just watches me, seeing me grow bigger and bigger.

I think the part that scares me is that, deep down, I don't want it to stop.