Sharing the same genes

As you watch your grandpa and Carrie, you can't help but feel a strange mix of emotions. It's not like you mind sharing her, but seeing her so eagerly obey your grandpa's commands is... intense. You can't help but feel jealous and the comparison between his massive cock and yours only serves to inflame that feeling.

Your grandpa, on the other hand, seems to be thoroughly enjoying himself. He takes a moment to look at you, his eyes gleaming with a mix of pride and lust. He turns back to Carrie, who's standing there expectantly, her breasts rising and falling rapidly with each breath. "Well, darling," he says, his voice low and commanding, "I'm afraid for my first command, we have to go downtown. So put something on." As you and your girlfriend start to dress, grandpa looks at you, "with we, I meant just me and Carrie." he smirks.

......

It's already midnight as they come back. You're watching TV in the living room, trying to ignore the nervous energy that's coursing through your veins. The sound of their footsteps echoes through the hallway, growing louder as they approach the door. You can see the sweat glistening on Carrie's skin. She glances at you with a mixture of shame and arousal, before turning to your grandpa, who's grinning widely.

"We have a surprise for you Son," he says grinsing at you. "Carrie, why don't you show him the present?" He winks at her standing next to him. There's a note of possession in his voice, and it sends a shiver down your spine.

Carrie, looking even more flustered grab her shirt and slowly pull it over her head, revealing her bare breasts beneath. As you sit, you look at her breasts, stomach, belly button. Nothing that you haven't seen a thousand times before. No changes.

But then she turns her back to you, and your heart skips a beat. You can't believe what you're seeing.

Your grandpa has had Carrie tattoo a large "Whore" across her back. The ink is still fresh, the words sharp and vivid against her smooth skin. You feel a mixture of shock and anger, as you look at the tattoo.

Your grandpa chuckles, "I think it suits her, don't you?" He slaps Carrie's ass, causing her to yelp in surprise. "Now, why don't you go ahead and show him what he's been missing? For my second command you have to wait two weeks." He grins wickedly and goes to his room.

Carrie's eyes meet yours, and there's a mixture of shame and desire in her gaze. She slowly climbs onto your lap, straddling your waist. Her breasts press against your chest as she leans forward, their weight feeling incredible. "I'm so sorry," she whispers. "I never wanted to hurt you." Her hands slide down to your crotch, and she begins to stroke you through your pants. "But I can't resist him." Her lips find yours, and her tongue darts into your mouth. You can taste the saliva and her desire. But there is something else. Some familiar but disgusting smell. You pull away, breathing heavily.

"Carrie, what's that smell?" You ask, trying to keep your anger in check. "It's cum for fuck's sake." You shove her off you, disgusted. "You kiss me after you had my own grandpa's cum in your mouth? WTF Carrie?"

"Ohhh that you mean," ponintig at her mouth laughing, "don't worry honey, it's not what you think," she looks relieved, "not your grandpa's cum, it's the tattooist's." she said cheerfuly.

You look at her, dumbfounded. "The tattooist's?"
"Yeah, I mean, he's an old friend of grandpa and it was his birthday, and...."

You can't believe what you're hearing. Carrie, your girlfriend, your love, has just told you that she swallowed the tattooist's cum, who is most likely your grandpa's age. Your stomach turns at the thought. "You're disgusting," you standing up from the couch. "You're pathetic. How could you do this to me?" You calm down, "So that was his second. Well since it was his second command at least he has no orders more to give."

"It wasn't his command honey." Carrie looking down ashamed like a little naughty girl. "It was a birthday gift from me and grandpa to him." She swallows hard. "Grandpa asked me to fuck him, but I'm on my period, so!" Her voice trails off, and she seems to shrink in on herself.

You feel sick. Sick from the thought of her with your grandpa, sick from the thought of her with anyone else. You want to believe her, you want to trust her, but how can you when all you can think about is the taste of her mouth, the smell of him on her skin? "Let's forget it!," you say, your voice barely more than a whisper. "Let's pretend this never happened, but first, please go brush your teeth." She gives you a naughty look, as if she's still proud of what she's done, and then disappears into the bathroom.

You tried to act like nothing had happened and so Life returned to normal. At least for two weeks. And then one morning, the three of you sit down to breakfast. "So Carrie, you aren't on pills you said?", grandpa said with a smile. "That's right grandpa, I'm not on pills why?" She smiled back at him, her eyes sparkling with mischief as she looks for something is her purse and as she founds it, "But don't worry, you can still have your fun, if it's about your second commad. Just add THIS to your plan, old man." Her voice dropped to a husky whisper as she leaned in closer to him and puts a pack of condoms in his hand. "And it's two weeks since your last period, right?", he asked, his eyes fixed on her face. "Do you think this is a proper breakfast conversation, Grandpa?!", you snapped, trying to change the subject. "Shut up, Son", he said, giving you a disapproving look. "I think it's important to keep track of these things."

You and Carrie stop eating and look at each other, horrified. Your mind is racing, trying to figure out if each of you thinks what the other thinks. Your breath hitches in your throat as grandpa opens his mouth to speak again. "Well, Carrie, about my second command." He pauses, a wicked grin spreading across his face. "I want you to give me a ...", he says, leaning in closer to her. "What? Grandpa, you can't be serious!" Carrie says, her voice quavering with fear and excitement. You feel your stomach twist into knots.

"Of course I'm serious, dear. It's been two weeks since your last period, and since your lovely boyfriend and I have almost the same genes, ..." He winks at her, and she bites her lower lip nervously. You feel like you might vomit. "My second wish is you having my child, Carrie." Grandpa's voice is cold and commanding, his eyes fixed on hers.

Carrie's face goes pale, and she looks at you in horror. "But... we... we can't... I..." She stammers, unable to finish her sentence. You feel your heart racing, your breath coming in short gasps. You can't believe what you're hearing. "You can't be serious, Grandpa," you manage to **** out. Carrie says "Yes grandpa, he's right. Let's not go overboard!" and pointing at the condoms pack she put in his hand, "please use those."

"Oh I will use this honey", grandpa said darkly, glaring at the condoms pack and crushes it in his hand. Then he grabs Carrie's hair, pushes her forcefully on the table and lifts her skirt and tears her panties apart. "Let's use the condoms Kiddo.", he grabs the crushed pack rollts it in butter and pushes the whole pack in her anus, till it disapears.

"Nnno Grandpa, no!" Carrie screams, her eyes filling with tears. "It hurts! It hurts so bad!" You feel helpless as you watch, unable to do anything to stop him. "That's right, it should hurt slut," he growls, holding her down with one hand as he cleans his other hand with Carrie's torn panties, just to use both hands on her head, holding her down.

He looks at you, "Come here Son, unzip my pants." You feel numb as you obey, your hands shaking as you pull down his zipper. "That's a good boy, take it out and put it into our whore." he says, looking at Carrie's dripping cunt.

You kneel between her spread legs, take grandpa's steel hard cock and points it at your girlfriends opening. Suddenly with a mighty power grandpa thrusts it inside her, tearing her almost apart. "Aaahhhh!" she screams in pain, "No Grandpa, please!" You watch helplessly as he begins to fuck her, his hips slamming against her again and again. "You're so tight, so warm," he growls, his eyes closed in pleasure.

Carrie's face is a mask of agony, tears streaming down her cheeks. You feel like you're going to vomit, but you can't look away.

Grandpa reaches out, grabbing your head, forcing you to watch as he comes inside her, filling her with his seed. "There now," he says, his breath ragged. "That should take care of it." He pulls out, wipes himself off with Carrie's skirt, and sits back in his chair, looking satisfied. Cum leaks out of Carrie's stretched hole and drips onto the table. Then he reaches with three fingers in her ass, Carrie screams and with both hands tries to push his hands out, but he enters her ass and she farts as he pulled the condoms pack slowly out of her anus. "Here son, put it back in her purse please.", he said calmly. You look at the packing coverd in butter, shit and blood. "In her purse I said.", grandpa repeats.

Your hands shaking, you take the bloody, butter covered mess and place it in Carrie's purse. She's still sobbing, her whole body shaking with the **** of her tears. "I'm sorry, I'm so sorry, come here princess" grandpa lifts her and sits her on his lap, cradling her like a child.

He looks at you, his eyes hard, "For the next two weeks, we will need the double bed. You will sleep in my room."
You nod, feeling numb as your grandfather grabs Carrie, throws her on his shoulders and goes upstairs.