Erica masturbates, of course.

"Well, it's a no brainer for me, Erica has to masturbate for us," Carrie replied, grinning widely "oh, it reminds me of that time we tricked her into stripping and washing Lisa's car naked!"

"Oh yeah, I remember being so surprised when she started fingering herself on top of Lisa's car," Alicia chimed in, furthering my humiliation "I remember her being so surprised to learn that she squirted in front of nearly fifty people."

Not exactly one of my shining moments, having been fooled so easily by Lisa into stripping for such a large audience, even thinking about that humiliating episode made my pussy tingle.

"Well Erica, go on, at least this time it's your car." Carrie said, though I wasn't exactly sure how it being my own car this time made it any less humiliating.

I walked back towards the car and sat on the hood, spreading my legs and reaching down to my pussy, already soaking wet and flowering open, revealing a tiny hooded button that attracted the attention of my hand, I gasped as I felt the jolt of electricity run up my spine, arching my back as it did, but I pressed on and continued to toy with it, rubbing it firmly as I looked back at Carrie and Alicia, filming me as I played with myself.

I let my fingers move on from my clit and enter my pussy, two slipped in and began stirring the insides, churning the juices with a clear sound that was probably not lost on my audience, I was horny and willing!

My fingers began pumping in and out of my pussy, slowly at first, but I picked up the pace soon enough, my voice began getting louder as I did, I closed my eyes and let the sensation take me as my climax approached its zenith.

Finally, as my brain reminded me that it was my own bet that caused me to end up like this, like a dam breaking under the pressure and releasing a flood, I pulled my fingers out and came to a massive squirting orgasm, my juices gushing out in an arc and landing on the asphalt, I could hear the girls clapping in enjoyment of my humiliating display.

Having released its tension, my body slumped back onto the hood and windshield of the car, breathing heavily as I continued to massage my clit, feeling the glorious afterglow of my dissipating orgasm.