Well, there I was...
In the doggy position with my face buried in a pillow and ass up as this stranger went to town pounding my ass with his big bare cock. It felt like he'd been fucking me for hours, even though I know it was probably more like 15-20 minutes. A nice creamy thrusting rythum of his hard thick cock's bare skin stretching out my snug hairy hole. I always loved these days when I got the chance to get naked with another guy and enjoy some man on man sweaty, dirty fun. Even better with it being a guy nearly twice my age. Him being 50 and me 27, the perfect daddy/son hookup.
I was deep in the moment, allowing my entire body to enjoy the intense pleasure from the slight pain of getting my hole stretched and my insides rearranged when I heard it.
"OH MY GOD!!! WHAT THE FUCK??!!!"
I knew that voice. My head darted up like an Ostrich popping out of the ground. There, in the doorway to my bedroom, stood my girlfriend of four years. I was in instant shock, not knowing how to move or speak. Within a few brief moments, as my mind began to slide back into the reality of the situation, I could feel my body pulsing back and forth. And just as soon as I realized that motion, I felt my muscles tense throughout my entire body. Including my ass clench.
As soon as my ass tightened, I heard the guy banging me groan out "AHHHHHH, GOD!", and felt a huge piping hot load of man love fill up my ass. This in turn caused me to squirt out a hot load myself onto the sheets below me.
Once again, my girlfriend cried out before turning and running out of the doorway; "Oh my god! That's fucking disgusting!" And as she ran down the hallway, I heard her mumbling out something in the effect of "What the hell is happening? What's going on?", which I have to admit, sounds a bit comical looking back on it.