[In an effort to not repeat past mistakes, I'm gonna tell you everyone who will be in the following chapters, that way I can't add more and can end the story naturally.
Makenzie, she's 13. Lily, her sister, is 16. Aunt Alicia is 34 and Alexis is 35.
Now that all of that's set in stone, i can't change it later, so hopefully this will be more competently written than the first time.]

Chapter 1

It was 11pm, me and my younger cousin Makenzie were laying in bed watching a movie. Me and her used to do this a lot, since we lived in the same house we'd crash in my bed while watching movies basically every night. Makenzie was only 2 years younger than me, her being 13 and I being 15.
By 12am, Makenzie had fallen asleep and I was left awake to finish the movie. She was wearing these nearly skin tight yoga pants and a t-shirt, as I was laying there bored out of my mind and trying to sleep something clicked in my head that I hadn't thought of before.
"Hey makenzie?" I nudged her roughly trying to see if she'd wake up, no reaction.
She was a pretty heavy sleeper, so I knew she wouldn't wake up at this point. I grabbed the blanket covering us and pulled it off, throwing it off the bed. She was still fast asleep. I wanted to take it slow but at the same time, I really didn't. I may have had all night but I was excited, so I grabbed the waistband of her yoga pants and slid them down to her ankles, then all the way off, not thinking about how I'd get them back on.
I pulled down my sweatpants and tossed them off the bed too, my 13 inch rock hard cock now exposed.
She slept on her side so I had easy access to her pussy, grabbing her leg and lifting it enough that I could slide my cock right into her pussy. She was dripping wet, I felt no resistance as my cock easily slid all the way in.
At this point, I saw no need in going slow, I was balls deep inside my younger cousin and her pussy was amazing. I began pumping in and out of her at a decently fast pace, at first I was loving her tight pussy, but then I realized I'd messed up bad. How the fuck would I get her yoga pants back on?
I didn't trust myself enough to slide them back on smoothly, I'd definetly end up doing something dumb and waking her up. She was a heavy sleeper, but I didn't know how heavy.
I layed there for a few minutes, balls deep in my young cousin and going through my options. Option 1, wake her up and explain what happened, hope she wouldn't be upset about it and would let me finish. Or option 2, just finish inside her and cover us back up, don't bother putting her pants back on.
As bad as each option was, I knew option 1 would probably be the most successful. If she woke up with no pants on and cum in her pussy, she'd be pissed I didn't ask. If she wakes up to me putting her yoga pants back on, she'd be pissed that I didn't ask her. At least if I told her what I did, she might not be as mad.
I shook her, keeping my cock buried deep inside her slit "hey, makenzie?" I shook her again, saying hey name louder this time and finally managing to get a groggy reply out of her.
"Whaaat?" She opened her eyes.
I just spat it out, not wanting to drag this Out. "I'm sorry for not asking but, I got horny and I just took off your pants."
She groaned "wait, is your dick inside me?"
"Uh, yea, I hope you aren't pissed.."
"Why would i be pissed? I'm in your bed, in your room. Im 2 inches away from you, i get why youd fuck me" She smiled at me "you didnt have to wake me up for permission, im in your bed, do whatever you want." she leaned in and kissed me on the lips. "Really?" I looked at her not sure whether she was being serious. "Yes, really." She rolled her eyes at me. "I'll sleep naked from now On, feel free to fuck me as much as you want." She sat up in bed and climbed on top of me. "Okay wow, I didn't think you'd be alright with this." Makenzie grinded against my cock "why wouldn't I be? From now on you don't have to ask, just use me whenever you want." I smiled "oh really, well how about you sit on my dick and ride me, help me finish what I started earlier." She nodded her head and sat up for a moment, lining my cock up with her dripping wet cunt before sliding down my shaft. "FUCK!" she moaned and screamed before covering her mouth.
"Wow, you're fucking tight!" I kiss Makenzie on the lips and smile. "Makenzie, I know you said I could fuck you whenever I want, but what about however I want too? Yk let me use your body however I please.."
"Fuck, quit asking and just do it! If you ask again, the offer is off the table." Makenzie moaned as she slid up and down my cock. I grabbed her hips and began forcing up and down the length of my cock faster and faster, as I did, my cock began to grow even larger inside of her making her pussy begin to tear.
"ahh~" Makenzie moaned as my cock continued growing inside her.
She smiles and starts moving up and down my cock faster and faster by the second, her tight pussy squeezing my cock and making it grow larger and larger with every thrust. "OH FUCK!!" Makenzie yelped in pain and pleasure as I felt my cock begin tearing her pussy due to its sheer size. I pull her down farther onto my cock, feeling it tear right through her pussy but not wanting to freak her out.
"Hey, makenzie, I think I pushed my cock through your pussy.."
"Through? What do you mean through my pussy?" She looked at me a bit confused but still eager to continue.
"Don't worry about it, all it means is your pussy couldnt fit my entire cock inside it so, i forced it through your pussy and into your belly."
"Well, okay." she smiled and kissed me on the lips.
"Makenzie, I want to see how bad the damage is first though, can you get off me for a sec so I can get a good look?"
Makenzie nodded and pulled herself off of my cock, as she stood up I looked down at my cock to see several feet of intestines wrapped around the length of it. I look up at her, worried how she'll react.
"Oh fuck… are those my guts?"
"Yea, they are.." i look at her "they feel really fucking nice around my cock though!"
"They do? I'm glad you like them."
I grab a few strands of intestines hanging out of her pussy and began pulling them out, wrapping them around my dick.
"You dont gotta do that, theyre my guts, i should be the one pulling them out."
I nod and let go of her intestines, allowing her to grab ahold of them instead and begin yanking them out through her pussy hole, managing to quickly pull out several feet of her own guts.
"Fuck Makenzie, if your guts feel this nice, i kinda wonder how they taste?"
"You do huh?" She giggles "just cut a little out then, if it tastes good you can have as much as you want, and maybe I'll even try a bit too.." Makenzie gave me a quick smile and I nodded, taking my knife out, i immediately cut a 3 inches of my cousins intestines out and push them into my mouth.
"Wow, you taste really fucking good!" I swallow the piece.
"They do?" Makenzie grabs the knife from me "let me try some then."
I watch Makenzie cut out a few inches of her guts as well before quickly eating them.
"Yea, you're right, my guts taste amazing!"
"So, you wouldn't care if I cut more of them out?" I smile.
"No not at all, go for it, just leave some for me." She reaches inside herself, quickly yanking out over a foot of her intestines.
I cut that part free, quickly cutting it again, this time in half as I hand part of your intestine to you.
"They're your guts so I figure we can split them 50/50, it's only right considering you might not make it too much longer.."
Makenzie raises an eyebrow. "No, I can handle a lot longer than this! I'm not a pussy, I can handle whatever you want." She grins, taking a bite out of her guts.
I roll my eyes and laugh at her statement "no way in hell you can keep this up!" I look her in the eyes "you'll be dead in a half hour, tops. You're really overestimating your own abilities here."
"Maybe I am?" Makenzie grinned "but it doesn't matter, I really don't care if you end up killing me.."
I give her a questioning look "Hmm, Well, would you care if I killed your sister, Lilly?"
She shrugged "not really, do you wanna kill her too?"
I nod. "More than just Lilly, I want your two moms to let me use them as well. I'll tell you what, if you can convince Lilly, Aunt Alicia, and Aunt Alexis to let me do whatever I want to them, I'll think about not killing you. Deal?"
She shakes her head "you don't need to make any deals with me, I'll help convince them in the morning. Once I get them all to agree, you can kill me or whatever you wanna do, i really dont mind."
"Okay, deal. But I suppose if you're gonna convince them in the morning, you'd also have to survive until then too…" I look down at her guts, still freely hanging from her pussy.
I look at her a bit dissapointed, getting off the bed and grabbing a bottle of pills from my nightstand, handing her one.
"Swallow it, it should heal your wounds and keep you from dying!"
Her nods and quickly swallows the pill
"So what now?" She asks.
"Let's get some sleep, that way you'll have energy for tomorrow."
Makenzie nods and cuddles up against me "Okay, sounds good, goodnight!"
I wrap an arm around her "goodnight."