As we stepped through the door, the smell of our step-bro's waiting body hit us. He was thrilled to see us, his expression a mix of excitement and eagerness. He knew exactly what we had in store for him. We locked eyes and he gave us a small nod, signaling his readiness.
We headed straight for the bathroom, shedding our clothes along the way. Our step-bro watched as we stripped down, his cock already hardening at the thought of what was to come. We reached the toilet and stood over him, our bare feet inches from his face. He whimpered softly, his cheeks flushing red.
"Please...," he begged, his voice weak.
"You know what you have to do," I reminded him, smirking down at him.
Without further hesitation, he leaned forward and began his task. His tongue darted out, tracing the crease between my ass cheeks before lapping at my anus. It was wet and ready for penetration. He pushed his tongue deeper inside me, causing my walls to clench around it. His fingers joined in, pressing against my entrance, trying to force it open wider.
While he worked my asshole, I heard my sister position herself behind him. She began to rub his erection through his pants, teasing him as he continued to please us both. His cock jerked in response, leaking pre-cum onto the tile floor. Soon, she freed him from his pants, revealing his already-hard length. She took hold of his cock and started stroking it in time with his tongue's movements.
The sensations were too much for him to bear. He groaned and thrust his hips back, trying to get more of my sister's hand on his cock. She obliged, squeezing the base of his shaft as she slid her hand up and down its length. It was such a turn-on for them both that they couldn't help but moan in unison.
We both watched as his face contorted with pleasure, his eyes rolled back in his head. We were in control and loving every second of it. Our bodies tingled with anticipation as we felt the pressure building inside us. It was time to empty ourselves onto our worthless step-bro.
Without warning, we both let go. Our feces poured into his eager mouth, coating his tongue and filling his belly with warmth. He gagged and choked on the first spurt but didn't stop sucking us clean. We relished the feeling of him between our legs, using him as a human toilet. As he worked his tongue to clean our asses, we began to grind our hips against him, taking pleasure from the sensation of our shit mixing with his saliva.
When we were finally satisfied, we pulled our soiled underwear out from under him and stepped away, leaving him covered in our filth. He lay there, panting heavily, his whole body trembling with excitement. He looked up at us through half-lidded eyes, still high on our scatological pleasure.
"That was amazing, thank you," he breathed, his voice barely audible above the gurgling noise in his stomach.
We chuckled and shook our heads in amusement. This was our little secret, our twisted game that we loved to play on him. It was like a drug to us; the power we held over him was intoxicating. We smiled at each other, knowing that there would be plenty more opportunities to use him in such a way. And he would eagerly await each one.
