As she followed her younger brother down the stairs to the basement, she wondered what he had to show her. She was hoping he was going to finally admit to his visits to her bedside when he thought she was asleep. She was quite anxious for him to put his cock to proper use inside her instead of jacking off in a towel in silence in her room. She dropped out of college to care for him when their parents died, and since he started high school, he was getting bolder in his secret affections toward her. Something about him cumming near her made her want him inside her.
He flipped on the lights and she saw his project hanging from the wall. It didn't look like much. Just a pipe with ropes.
"It's a dungeon display for a haunted house. A volunteer will get tied up in it and wail to be let free."
She was intrigued by it thinking of the possibilities, but disappointed that her panties were going to remain untouched.
"Of course I need to test it out. Make sure it looks real."
She had an idea,"Try it on me."
"Well, I dunno..." he seemed quite unsure.
"Oh it'll be fun" she said.
"Okay then" he took her hand "stand here and I'll get you hooked in" he led her in front of the bar wrapping the ropes around her neck. He slowly snugged them until her eyes glazed a bit. Her mind went giddy a little as her blood flow was slowed to her brain.
Seeing her state, he opened her blouse and slid it off her. Next he undid her bra throwing it aside. He noosed her boobs and cinched them tight. They bulged round and proud and she stroked his hair as she pulled his face into them. Around her back he ran the ropes and then he tied her arms to the pole. Her nipples were swelling and he sucked both hard to ripen them for what was to come. She was cooing in delirious expectation.
"Are you gonna fuck me little brother?" she asked as he unzipped her jeans. He just grinned and pulled them off her. He reached into her panties and stroked her mound, then probed her roughly with his middle finger. She moaned and he slid off her panties. He raised first one leg then the other high as he could, tying each above the knee. She was ready. Spread and moist with desire. But he wasn't giving her just a simple fuck. This was a test of a torture device.
Her nipples were puffed full from pressure of the rope. He took a knife from the table behind him and slowly split each plump areola. The inner force made them blossom like red roses. Her tits were numbed but she felt the burning and she groaned, "Oh yes hell yes, bite those titties boy".
He watched her body react. Her pussy opened and closed as she was nearing climax. He went to the corner of the basement and retrieved a cloth sack. From it he withdrew a large rattlesnake. It was still groggy from the chloroform he used to sedate it. All it wanted was a safe warm place to hide. So when he presented her snatch to it, it slowly made its way into her.
She spoke hoarsely, "What are you doing to me. Fuck me like you mean it. Don't just stick it in me and jizz. Make it hurt!"
The snake was trying to get in further but she was full. It would retract soon so he had to stop it from exiting. Two pieces of tubing were handy. He gauged her abdomen and the position of the snakes head. He wanted to trap it not kill it. He took aim and plunged into her belly to the left and then on the right. She was roaring with pain thinking he was penetrating her with a giant cock.
The snake started to writhe, needing to exit for air. It got wilder for a minute and then slowed down ,but it was enough to stimulate her orgasm. Her cervix throbbed against the viper and it struck inside her, injecting its venom in her pulsing womb opening. He waited for the snake to die in her and he pulled it out. Venom poured from her slit. He was ready now to burst. Planting his penis into her, he ground hard as he spewed cum into her. When he finished unloading, he relieved his bladder in her, washing out the cum and venom. As he did, the warm wetness made her release down his legs. He smiled and licked the juicy incisions on her breasts. He would have to let her down eventually, but not until she begged...