As I lay down on the cold, hard floor of the filthy bathroom, I couldn't help but feel nervous and excited. My lover, a dominant man named Marcus, had instructed me to prepare myself to take his huge cock into my tight ass, no matter how much it hurt. He promised it would be worth it.
I playfully kissed him on the neck, feeling his warm breath against my skin as he tore off my clothes. His dominant gaze never left mine as he made me kneel in front of him, naked and vulnerable. He slapped my ass hard, making me yelp slightly, and then spread my cheeks apart with his big rough hands.
"You know what I want," he growled, his voice echoing in the small space as he pushed his cock against my tight rosebud. I gasped in pain but also pleasure as he slowly, methodically penetrated me with his massive member. He filled me up, stretching my hole to its absolute limit as he grabbed my hair and forced me onto my stomach.
My ass was now completely exposed to Marcus, and I felt both humiliated and turned on by the situation. He moved behind me, his hands roaming over my body as he teased my sensitive nipples with his fingers. With his other hand, he grabbed hold of my hips and started pounding into me hard and fast.
I couldn't help but moan as the sensation rippled through my body. Marcus's cock was like a piston hammering away at my tender hole, driving me wild with desire. I responded by pushing back against him as hard as I could, taking as much of his enormous member as I could stand.
Then came the moment I had been dreading - the inevitable urge to poop. The feeling started in my bowels like a tickle, quickly escalating to a violent itch that made my whole body twitch. I tried to ignore it but it was no use. As he continued fucking me from behind, I felt a huge log forming deep within my bowels.
I bit my lip nervously, not knowing what to do next. Should I tell Marcus? Would he stop? But before I could say anything, it happened. The log finally broke free from my restraints, slipping out from between my tight sphincter muscles with a soft squishy sound.
Marcus didn't seem to notice the change at first. He continued pounding into me, his breath hot against my neck as he growled with pleasure. But then he suddenly went rigid behind me, his cock pulsing inside me as he came hard.
I felt his warm seed shooting up my insides, filling me to the brim with his essence. And then, just as suddenly as it started, it was over. He pulled out of me, leaving me weak and exhausted but also more satisfied than I had ever been before.
As we cleaned ourselves up in silence, neither of us mentioning what had happened during our passionate encounter, I couldn't help but wonder: Would Marcus ever find out about my dirty secret? Or would this remain our little dirty fantasy...forever?
