John heard an odd noise as he entered his cousin Cassy's house. He was there to return a borrowed table they'd used at his 18th birthday party just last week. He thought back to how drunk Cassy had gotten, and how loose her shirt was when she bent over. She seemed to do that a lot when she was drunk.
The sound reminded him of skin against silk mixed with the friction of rope against wood. He'd told them he was coming by sometime later this evening, but unexpectedly had time to stop by earlier. He figured they wouldn't mind, she did say she was just working on her new house today with his sister Rebecca.
"Rebecca, is that you? How long does it take to get some toys? This damn rope keeps getting tighter!"
John froze, confused as to why she'd be tied up at all, and quietly walked into the bedroom. There she was, in all her glory, nothing but bare skin, rope, and a blindfold. Her perky b-cups were stretched flat as she bent her back, struggling to wiggle loose.
"This is the last time we use this rope, I can't move a muscle without it getting tigher!" she said.
John remained silent and shocked as he took in every detail of the sight laid before him. This was like a dream, he thought. He had always had an incest fetish and the biggest crush on his cousin. He was never very close with her due to their age difference, but always wished he had the chance to be closer to her. Though he never imagined something like this would ever come true.
A new thought entered his mind. Why is she tied up spread eagle on a bed like this and asking for Rebecca? Are they lovers? They were always far closer than John and any of his other cousins. But this close? The thought made his member twitch.
He didn't know what to do. A thousand thoughts crossed his mind. Do I take advantage? No, that's wrong. Do I take a picture? Is that any better? While he continued to weigh the moral and ethical ramifications of each and every incestual thing he wished to do in that moment, he heard footsteps behind him.
He turned around, finding Rebecca standing in the doorway, equally confused and shocked as he was. She was wearing only a thin silk bath robe which did nothing to hide the rock hard nipples of her d-cups poking out from between strands of long dark hair. The figure of her college volleyball player body left little to John's very overstimulated imagination. After a moment of confusion she looked down and saw what John had been ignoring. A bulge had grown where no bulge should be when viewing your naked tied up cousin and barely dressed sister. Her face turned from confused, to blushing embarrassment, to a look of confident knowledge in what needed to happen next.
"Why are you being quiet? Did you get the vibrator or what?," said Cassy.
"Yeah, I've got it right here. But I decided we're not done yet," said Rebecca. "The strap-on we bought was delivered, and I got too horny thinking about using it on you to cut you loose yet."
John barely recognized the obviously horny, slightly cracking voice of Rebecca. She seemed both nervous and excited at whatever she was about to do. John just now noticed the small package under her arm. She sat it down on the bed. Rebecca turned to John and took out her phone. She stared at it for a second, as if thinking, and then took a few steps back. She raised her phone and took a picture, making an effort to get both John's still befuddled yet horny face and Cassy's blushed naked body in the picture. She then began typing, and held up her phone.
EAT HER
John stared at the two simple words for longer than should be necessary as Rebecca lowered her phone and brought up the picture. John understood, as he had from the moment she took the picture but now finally accepted, that she was blackmailing him into committing an act of incest they clearly both wanted to see.
Rebecca motioned at Cassy's pink slit, still surrounded by red flushed skin from whatever they'd been doing before John showed up. John's mind was beginning to clear, as much as it could given his arousal. Even that began to change as his confusion and worry and embarrassment began to stop getting in the way of his hornyness and pure lust for his cousin.
John noticed Rebecca moving to make sure Cassy's blindfold was still tight, so John waited so as to not make two sounds in two different places. He suspected Rebecca's plan involved Cassy finding out John was there, but not yet. Not until after they'd done too much to turn back. John got up on the bed, trying not to touch Cassy's legs so she wouldn't feel the wrong clothing or abundance of body hair. The close up view of his hot cousin's pussy was almost enough to make him cum on the spot. He moved his face in close and teased around the edges, tasting her and taking his time.
After what seemed like mere minutes and many hours she was arching her back. He'd used every technique he knew, and finally found what was going to set her over the edge.