From his precarious position trapped beneath his twin sister's butt cheeks, Damon heard a disturbing rumbling sound echo through her flesh. Sarah followed up by lifting herself ever-so-slight from the seat, providing the crushed boy with a small amount of relief. Damon breathed a sigh of relief as her puckered asshole pulled away.
"PFFFFFFFFFFT" her asshole screamed as a blast of hot, burning gas exploded from the hole. It smelled like rotten eggs and stung his eyes and throat. Tears streamed down his face as he screeched in pain.
"Oh my goodness," his Mother Tanya said across the room, "Sarah, don't do that in the kitchen!"
"Sorry mommy, this is for a project," Sarah said, jotting some notes onto a piece of paper while stuffing her face. "I'm researching chemical methods of reducing the smell of flatulence."
"Well clearly," her mother said between coughs, "it's not working."
"I'll admit, it's quite rancid," Damon's sister explained," but science is about sacrifices after all. Someone's gotta pay the price."
At the moment, that seemed to be Damon as Sarah let off another stink bomb, flooding the room and her twin with more of her "experiment". He could feel his lungs constrict as they were assaulted once more. His breathing tempered, devoid of precious oxygen. If this kept up he would have seriously been in danger of chocking to death on his sister's gas. Fortunately, his sister relented.
"That's enough fuel for me," She joked, rubbing her flat stomach. "If you need me, I'll be in my room working."
Sarah left the kitchen behind and made her way back to her bedroom with Damon unknowingly plastered helplessly against her butt-hole. On the way, she stopped by the bathroom, only to find that Freya was taking a shower. It wasn't a big deal, but she had come to realize on the way that something had gotten stuck between her cheeks.
Assuming it to be an embarrassing "discharge" from her farts, she grabbed a tissue from nearby and plucked the obstruction out. Damon, who had been hanging for dear life, was both relieved and worried as he was scooped up into the soft piece of paper. With the object in hand, Sarah...