My Sister helped me with my Boner (edited)

I want you to tell you of something that happened to me that if I told you I'm sure no one would believe.
I was in my twenties and visiting my parents. I was back from university for the holidays.
They had arranged for us all to go out for a meal that evening, so we all had to be ready for a curtain time.
As I was on my own in my bedroom, I was feeling rather frustrated after an afternoon of family talks and discussions, so I decided to have a good jerk off, but for some reason, I sometimes, if I’m not dating, just like to blow off steam and a load of cum, but this time I couldn't get it hard. Maybe the trip down or just that I wasn’t getting it much; nothing seemed to work.
So in my infinite wisdom, if I’m stuck and needed to really give a girl a good hard fuck, I take some enhancing tablets, so to speak.
Popping a few, I waited for the reaction to take place.
Sure enough, within twenty minutes, I had one hell of a hard-on. Laying on my bed, I started to pump my now mega-hard cock, hoping to finally relieve the frustration I had felt all afternoon.
Still, it wouldn't happen, nothing, just laid there my cock pointing straight up but nothing.
The thing was time was moving on and it wouldn't go down. The stories of these tablets giving you a long-lasting hard-on on this occasion were true.
Then out of the blue, Mom knocked at my door. “ You getting in the shower soon? We have to be ready to go in a few hours.”
In my very nervous voice, I shouted back, “Okay, Mom, no problem.”
“You okay? You sound funny,” she said.
“Yeah, I'm fine, just working on something that's all,”
“Okay, whatever it is, hurry up, okay,” she said.
The thing was it wouldn't go down. My bloody cock was so hard that I was worried if I couldn't cum I would have one hell of a bulge in my trousers all night.
After about twenty minutes of trying hard, things were getting a bit worrying. Nothing was happening. Then my slightly younger sister knocked at the door and just walked in. Holding a basket of washing, she said, “ Mom told me to bring you this.”
“Don't you ever knock,” I shouted.
Then looking straight at me, she said, “You’re jerking off when you should be in the shower,” she said.
“Look, leave me alone, okay? Yes, I'm bloody jerking off,” I said in a hushed voice.
“Mum’s going to kill you if you're not ready. You know they can get mad if we piss them off,”
“Don't you think I know that? Look, close the door,” I said.
“What's the matter with you?”
“Look, I took a pill, okay? Now it won't go down,” I said.
“You daft sod, what are you going to do?”
“That’s it. I don't know. I'm stuck,” I said.
Well, I don't want any arguments tonight, okay? I'm actually looking forward to it.”
“ I know me too, but it's not going to look good, is it, with me having this bloody bulge in my pants,” I said.
“Okay, look, do you want my help?”
“What? How the hell can you help with this?” I said.
“Look, you have a problem. Do you want my help or not?” she reiterated.
“Okay, how?”
“
Back in five minutes,” she said.
Still, while she was gone, I kept trying to sort this mess out. Still, it was so hard it hurt. Then my sister came back, saying, “For all our sakes, this better work, okay?”
“What will?” I asked.
“Look, I'm your sister. You’re my brother. We help each other, right?”
“Yes, why? What are you thinking?”
“If I do this, you will owe me big time,” she said.
With that, she grabbed my sheet covering my cock. “ What are you doing?”
Then leaning forward, she pushed me backwards onto my bed. Taking my shaft in her hands, she proceeded to pump the hell out of my nine inch cock.I couldn't believe what she was doing. She just went for it. Each long rub seemed to make things worse.
“Christ, sis, what the hell?”
Looking up, she just said, “ You want to cum, don't you? So shut the fuck up and let me sort this,”she said.
With that, I laid back and let her do what she wanted. Her fingers wrapped around my cock and going at it like hell, but nothing was working.
After ten minutes of pulling my cock, she realised it was going to happen.
“Jesus, how many tablets did you take?” she asked.
“Two,” I said.
“You suppose to only take one, you stupid idiot,” she said.
“So what now?” I said.
“Okay, plan two. Now this better work, or it’s plan three,” she said.
“What’s plan three?” I asked.
“Let’s hope we don’t have to go there,” she said.
With that, she knelt up. Then, without warning, she just took my whole cock in her mouth. She began sucking like mad. I jerked myself upwards just as she took every inch down her throat.
It was crazy. I had my younger sister sucking my cock, and to be honest, watching her head just going up and down on me should have set me off, but like last time, nothing. Just a bloody hard cock and its lack of cum.
Seeing the frustration in her face, she lifted off me. “What now?” I asked.
“Plan three, I guess. If this doesn't work, you’re screwed.”
Standing up, she turned around. Lifting her skirt, she just stood there and, without warning, she just whipped her panties off.
“Whispering, I said, “What the hell are you doing?” “Saving your life and tonight’s dinner,” she said.
“I’m going to bend over, and plan three is you fuck me,” she said.
“What the fuck are you on about? I can’t. You’re my bloody sister,” I said very quietly.
“Look, do you want that cock of yours to go down or what? You can gladly walk around with a stiffy all night. I couldn't give a toss, I'm doing this to help. So if you want my bloody help, then fuck me. It’s your choice,” she said.
“ this is stupid, we can’t, or should I say you can’t, Christ sis your crazy you know that,”” I know, so you going to fuck me or what,” she said in her very stern voice.
“And keep your mouth shut, if our parents find out you fucked me, then we are both screwed,”. She said.
She then turned around, flipping her skirt up over her pert tiny backside. She bent over while opening her slim legs slightly. All I could do was do what she wanted me to do.
Under my breath, I mumbled my disapproval, but thinking about if she was right, if I didn’t get this bloody thing to go down, I’m screwed.
Taking hold of my hard cock, I guided it between my sister’s bum cheeks, trying to locate her pussy hole. She fell forward onto my bed, burying her face in my sheets to muffle any sounds she may make. I slid my still solid shaft inside her and began to fuck my sister's pussy. She was so tight on my cock, but that feeling of her young pussy wrapped around me felt incredible.
Holding her hips, I pushed my cock into her as far as I could. She then lifted her face, saying in a very hushed voice, “You best hurry up, I’m going to bloody explode in a minute at this rate.” My cock continued to thrust deep into her. As I watched her push back against my incursions, I just pounded the hell out of her delicious, tight young pussy.
Then, luckily, I felt myself wanting to cum. Plan three was working. I was going to shoot.
“You bloody nearly done yet,” she begged, just as she said that she herself came. She pushed me back so hard my cock sank so deep up her I nearly came in that one moment.
Then I thought I couldn’t. I couldn’t cum in her pussy, so pulling out just in time, I let out a very low groan. Holding my cock, I spurted a load of cum over her backside. Thick, white globules of cum just splattered her body.
“ Jesus Christ, sis, I can’t believe you’ve just let me do that, god you’ve an amazing pussy,” I said.
“If you say so. Right after that, I’m showering first. And bloody remember, don’t you ever say a bloody word about this, okay?” she reiterated in another very stern voice.
She then promptly let me out of my bedroom, thinking to myself, crisis averted. I flopped onto my bed in disbelief at what had just happened.
I fucked my young sister, and the whole thing was incredible.
The evening went as expected. All was calm with us after my cock issue. My sister was the star of the whole day for me. She kept me from being the biggest idiot a brother can be by what she did for me.
After we returned home, we all made our way to our rooms. As I lay on my bed, still with thoughts of my sister’s body knelt before me and how I watched her young pussy devour my cock, my phone flashed up a message.
“You still awake,” my sister put.
“Yes, why? What’s up?” I replied.
“ I need a favour. My pussy’s on fire. Any chance of you putting it out with that bloody cock of yours?” she put.
That was it. The thought of plan four instantly set my cock off once more. She was horny and needed it again even after what she said earlier that day.
“I thought you had had enough of my cock after this afternoon,” I put.
“Yeah, well, your cocks huge, bigger than my boyfriend’s. After this afternoon, my bloody pussy’s been on fire all night. I just need it sorted. That’s all,” she replied.
“ I can do that. You best be quiet though. Mum and Dad are sat drinking still.” I said.
The next thing was a quiet knock at my door. Letting my sister in, she whispered, “ We have to be quiet—so Mum and Dad don't hear us.”
“It's okay. I can do quiet,” I said.
“ I just need a quickie, okay? Same as this afternoon.”
“Okay, I can do a quickie if it helps,” I said.
As she only had a robe on, she turned round as she did last time, letting her robe drop to the floor. She stood there in a very skimpy underwear set. Like last time, she just slipped off her panties and buried her face in my sheets on my bed.
Once again, my cock instantly went hard. The sight of my sister’s young body bent over in front of me was a sight I didn’t ever think I would see again.
Dropping my shorts, I let my cock loose. While she was bent over, her legs once again slightly apart, I reached down between her legs. With my finger, ran it down over her moist hole then gently felt her tiny pink clit It was so wet and warm on my hand,” oh my god, you sid, becareful it’s still bloody tender after this afternoon,” she said.
Looking down at her young, amazing body, her arms outstretched gripping my sheets, her face buried into my bed, thoughts of whether we should be doing this again crept into my mind, but the sound of her groans and the need for her to want my cock again took over.
I had to fuck her again, I had to give her pussy what she wanted, so all I could do was take her once more.
I slid my hard cock back inside her wet hole, god she felt amazing, I could see myself just pushing in between her young, tender, hot lips.
Just as I was inside, she lifted her head, saying, “You can cum inside me this time, I'm on the pills, so it's ok” she whispered.
That comment just seemed to spur me on, I slowly pulled out slightly, then ever so softly, I pushed back up her pussy, her body now in tune with mine, she started to gyrate against me, each deep thrust was met with her pussy pushing against me.
As she wanted a quickie, I just started to fuck her hard, she gave out awesome, loud, muffled grunts while my cock was vigorously pounding her young body.
Within a few minutes, I could tell she was going to cum, her pussy was clamping down on my cock, I was still going in hard when she suddenly stopped moving, with both my hands on her pert backside, I thrust in so deep I felt my shaft pulse and then all of a sudden just splattered her pussy walls, at that moment, her orgasm I could feel was so intense I could feel her body twitching and jerking on my cock.
For just a few moments, we were locked together, my cock still wedged deep inside her while she allowed her orgasm to subside.
“Jesus Christ, I thought this afternoon was good, but my god that was far better, that’s the hardest I’ve cum on any cock ever,” she said.
It was then her legs gave way, she suddenly fell forward, and as she did so, my still hard cock pulled out of her pussy.
I was stood there, my cock now just hung down with dribbles of my cum on my cocks tip.
She just laid the face down as I watched my cum just drip from her spent, you-tight pussy.
“ we best keep this our secret, if it ever got out we have sex god knows what they will say,” she said.
She then stood up, grabbing her panties she gave me a quick kiss on my forehead and left my room.
I just sat on the edge of my bed, again realing from what had just happend, I had sex again with my sister and the thought of it I just couldn’t believe.
I cleaned myself up then just as I got into bed my phone went off.
The message said,” your an amazing brother with an amazing cock, if you ever need my pussy again, just ask, and if I need that cock of yours I will do the same, you best delete this message just in case,lol” she put.
After that we did it a few more times, but as I was away a lot she had to be happy with her own boyfriend's cock.