Jeff decided to go back to his room and wait. With the slider set to 100% attraction, Jeff’s sister wouldn’t be able to resist fucking him. Their parents wouldn’t be home for a few hours, and he knew that Natalie was taking birth control, so there would be no problem in him taking her pussy.
Meanwhile, in Natalie’s room, she was still rubbing her pussy.
‘Why is he so hot?’ she thought. Jeff was a pretty average kid, but for some reason he was driving her crazy. She had never felt an attraction like this before, especially not towards her brother.
Natalie heard Jeff close his door across the hall.
‘This is wrong,’ she thought, as she got up and walked to Jeff’s room, still debating if it was a good idea in her head.
In his room, Jeff lay on his bed, testing out the other functions of the Chronivac. He had made his penis 10 inches long, and made his muscles more defined.
His door opened; it was Natalie. She was clearly a bit sweaty, and she was looking at his face weirdly.
‘Hey Jeff…’ she said. When she saw that Jeff wasn’t wearing a shirt, she blushed intensely, looking at the floor.
‘What’s up?’ Jeff answered, sitting up.
‘Can I ask you something?’
She went and sat on his bed next to him.
‘What is it?’ Jeff asked.
‘Do you ever… Can I…’ She sighed, frustrated. She was struggling to get the words out. She was getting flustered, looking at her brother’s muscles.
‘Are you feeling alright?’ Jeff asked, knowing the answer already.
Natalie shuffled closer to Jeff, their faces now inches from each other. She put her hand on his defined pecs. ‘I know this is wrong, since we’re related and all, but, I really like you Jeff. I don’t know why but I just can’t stop thinking about you.’ She could see Jeff’s cock getting hard.
‘Natalie, I…’ Jeff said. Natalie put her hand on his cheek and gave him a peck on the lips. After a second, Jeff returned the favour, and they started making out. Natalie pushed Jeff down onto the bed, laying on top of him. Their moves became more passionate, and Natalie could feel her pussy getting even wetter. She took off her top, allowing Jeff to see her naked tits. He started to touch her breasts and suck her nipples, causing her to moan.
‘This is so wrong,’ she thought.
Jeff, with a handful of his sister’s tits in each hand, couldn’t believe what was happening. All thanks to the Chronivac he was making out with the hottest girl he knew, his sister. His cock was at full mast now.
‘Jeff, please, I need it,’ Natalie said, putting her hand on Jeff’s crotch. Jeff got up and undid his zipper; his sister took it as an invitation.
‘Oh my god, Jeff!’ Natalie gasped, pulling out his huge cock. ‘I knew it was big, but not this big!’ She stared in awe. Jeff smiled.
Natalie got down on her knees before her brother’s cock, and kissed the tip, eliciting a satisfied moan from him. Jeff put his hand on her head, stroking her blonde hair. She closed her plump lips around his shaft and started to suck it. She wrapped a hand around his thick cock and started to jerk him off simultaneously. Jeff’s cock somehow became even harder than before. It felt amazing, his sister definitely had experience. Natalie couldn’t believe what she was doing, but she was so horny, she didn’t care.
She started to rub her pussy while sucking his dick, until she couldn’t take it anymore. She got up on the bed and lay on her back, presenting her pussy to him. Jeff knew what she wanted. He stepped towards her, and rubbed his cock on her pink lips, making her gasp. Natalie looked him in the eyes.
‘Please, Jeff, fuck me!’ she cried, and Jeff pushed his penis inside her, causing her to moan loudly.
Jeff started fucking her wet pussy, his massive cock pushing his sister’s walls apart. His movements got faster and faster, Natalie moaning with each thrust. He fondled her perfect tits with each hand, making Natalie moan even harder.
She grabbed Jeff by the shirt collar and pulled him close, kissing him passionately, while he continued to thrust into her dripping wet pussy. She wrapped her arms around his lower back, pressing her face into his shoulder to suppress her loud screams.
Both of them were nearing climax.
‘I’m cumming!’ Jeff said, grabbing her fat ass.
‘Do it! Cum in me!’ Natalie cried, as Jeff grunted and unleashed his load into her pussy. At the same moment, Natalie’s legs shook as she came too. Jeff kissed Natalie again as his cock pulsed, sending rope after rope into his sister’s pussy.
Jeff got off of his sister and lay next to her.
‘Oh my god, I can’t believe we just did that,’ Jeff said. Natalie was at a loss for words; she laid on her back, out of breath, as cum seeped out of her pussy. She still couldn’t think straight. Jeff looked over at Natalie, and kissed her, they started making out again.
Jeff wondered if he should put his sister’s attraction back to normal, or if he should keep it how it is, and make this a regular thing. Better yet, he could get someone else involved; his girlfriend did want to try a threesome, after all.