I always knew I was a little different to most guys, well, what most guys admitted to be but I didn't care. I lived at home while I waited to join my classes at my local technical school, my sister Sarah, a year older than me, also lived here while she attended community college.
Our parents were pretty easy going, they both worked for our Uncle's law firm so they worked a lot of hours, Dad still managed to keep a pretty tight rein on any potential social life though since he didn't trust anyone but we had a pretty good life.
One of my guilty pleasures, well, since I found it that is, was jerking off to nude pictures of my sister. I knew other guys likely did too, but I didn't care. I had stumbled across her Instagram page (okay, I looked for it when I seen the app on her phone) and found she had a 'secret show' page too, bunch of women have them these days, pay x amount to get access to nudes and videos. Her Instagram was pretty tame in comparison, face always blurred but showed a lot more than she did in real life since she loved her dark, baggy clothes but she was hiding a sexy as fuck figure and for her paid subscribers, had a real nice collection of lingerie and toys.
I viewed under one of my fake emails and usernames and paid with a prepaid visa card so I could hide who I was. Well, that was the plan at least.
With our parents at the lake that weekend, on Saturday I sat down to my ritual for Sarah's new content that she posted every Friday night, door closed, bottle of lube and some tissues for cleanup. I found the picture I liked best then pulled my shorts and boxers down and jerked off. For the set, Sarah was wearing a really cute pink shirt to start off with and ended up naked with a finger inside her pussy, her legs spread for the camera. Once I'd cum I cleaned up and went downstairs for breakfast, Sarah was already there drinking coffee.
"Hey, I'm going to see Lisa in a bit and this guy I like is going to be there, can you help me decide between 3 shirts? I really need to go shopping," she said, not looking up from her phone.
"Why don't you wear the pink one?" I blurted out. Thank you brain.
"What pink one, I don't wear pink dude."
She looked up at me to see my face going red.
"I uh, I mean you should try wearing pink."
"What are you talking about Marcus, I wear like 3 shades of black or dark red."
Her face seemed to catch up at that point, she started at me for a second then
looked at her phone.
"You better tell me the truth or I swear.. How did you know?" she said sternly.
"I... I found your page."
"Which. Page."
"Y... your Secret Show one."
Sarah just stared at me for what felt like forever but eventually spoke.
"What do you want," she said.
"I... I don't understand."
"To keep it quiet, it's the only reason you brought it up right? To blackmail me or something?"
"I... I don't know."
"The money is to save for a car, I'm not fucking paying you off. Wait, why.. Are you zero cold 924?"
"Y... yes."
"If you're trying to be sneaky, try a number other than your birthday. You've liked every single picture and video I posted. I'm your sister."
"You're also hot, you hide under that baggy shit you wear all the time but your body is amazing and I like pale girls. You're just so sexy I didn't care who you were."
"So you get off on these pictures?"
I nodded.
"Okay, so not trying to blackmail me. Go and shower then come to my room, you're going to help me and as thanks and to keep your fucking mouth shut I'll give you a blowjob. I don't think I need to say this but tell anyone and I'll cut your balls off, got it?"
"Y.. yes."
"Go."
I didn't want to argue with her. My morals were already fucked up, the thought of the girl I'd been jerking off to for months sucking my cock had me hard by the time I was in the shower, I didn't let the fact that she was my own sister even enter my mind.
By the time I'd showered and walked to her room she had changed out of the dark clothes she was wearing at breakfast and was sitting wearing the pink shirt from her shoot. My cock sprang to life noticing her nipples pointing through the shirt.
"Not sure why you bothered getting dressed again, can't suck your cock through your shorts," she said, matter of factually.
"Sh... should I undress?" I stammered, I was nervous as hell.
"Well yes. You ever done this before, with a girl I mean?"
"No."
"Mmmm, good. And this doesn't weird you out, that I'm your own sister?"
"No, I've been jerking off to your pics since I found them, you're just so sexy."
"Well, thank you."
I stripped off and stood before her naked, my cock already at half mast and just looked down. Sarah had me look at her then pulled her t-shirt off, letting her pert 36c's out before my eyes. That got me fully hard. She got on her knees and started stroking my cock while she looked up at me.
"I'm going to get a couple of pictures of this in my mouth then I'll give you a proper blowjob but these will be awesome, you have a nice cock," she said, messing with her phone.
I didn't really register what she said, I had someone other than myself holding my cock and it felt amazing. When she put her mouth on me I groaned and had trouble staying on my feet when I felt her tongue explore the head of my cock. When she'd finished with her pictures she put her phone down and had me sit on her bed then concentrated on my cock. I'd love to say I was a big stud and lasted long but her mouth felt exquisite and feeling her breasts rub against my inner thigh I groaned and barely managed to warn her before I was cumming, my cock swelling as I sprayed her mouth with my seed. Her eyes widened a little but she kept sucking me until I was spent but held on to my cock to get a few more pictures of my load before she swallowed it.
"You jerked off this morning and you had a load that big again already?" she said.
"Y... yes, pretty much every time."
