How did this all start you ask? How did my sister become my cum slut? Well, it all started when I was 24. My younger sister, Kristen, was 19. We had never been super close, but we had some mutual friends and we got along well. I had begun to notice how sexy my little sister had grown up to be. She was shy and never had many boyfriends. I knew she wasn’t a virgin, but I also knew she was never really popular with the guys. It’s a shame too. She had long, black curly hair, a nice cute face, and a short but slender body. Her b-cup breasts were very well proportioned for her body. I often found myself jealous of the boyfriend she did have. I often wondered what she enjoyed sexually but always assumed that her sex life was rather boring. I always wanted to change that, and change it I did.

I had just graduated college and returned home. I briefly lived with my parents and Kristen before finding a place of my own. I hadn’t had sex in awhile since my old college girls were all hundreds of miles away and my old highschool girlfriends were all in committed relationships or married. I missed my old cum sluts and the way I’d be able to force them to take my cum as well as the cum of other guy’s. I always enjoyed taking control of them and being in charge of their mouths, pussies, and asses. I definitely tried to find girls to fuck, but coming from a small town it wasn’t easy. It was during this time at my parents’ that I noticed how sexy my little sis was. One weekend while my parents were out she had her boyfriend over and I could hear them having sex in her room. I snuck to her door to listen, hoping to hear something great. The sex sounded dull and boring though, and didn’t last long. I was disappointed and managed to sneak back to my room and masturbate alone to some porn.

Not long after I moved out, Kristen also found a place of her own. Me and her boyfriend helped her move in. He was an alright guy, but just boring. I didn’t really talk to him much. After we were done he stayed as I left and I found myself jealous of him for being able to break in the new place with my sister. I fantasized about her taking all of my 8″ cock in every hole and getting filled with cum. I hadn’t cum that hard in a long time.

One night we made plans to meet some mutual friends at a small, local bar. I hadn’t seen them in awhile and was excited to see them. One of the friends was Lauren, my first real cum slut in highschool. The other three were the three brother, Mike, Matt, and Paul. I had tossed them a few of my cum sluts before I went to college and during summer breaks. Of course, my sister never knew any of this. I went to great lengths to keep her from knowing the how many girls I had fucked and my level of depravity.

I went to Kristen’s to pick her up and take her to the bar. She was dressed in a t-shirt and sweat pants, looking like she had lounged all night until now.

“So, are you ready to go,” I asked.

“I just want to change real quick”

I waited for what seemed like way too long after she went to her room. I know girls can take forever to get ready, but I was anxious and just wanted to go to the bar. I decided to go see what was taking so long and walked outside her room. Her door was slightly ajar and I looked in. Inside was my sister, wearing nothing but panties, laying on her bed, with one hand in her panties furiously rubbing her pussy. I was instantly hard as I had been fantasizing about her and hadn’t had sex in months. I began touching myself without realizing it, turned on by what I was seeing and by hearing her soft moans. I was in auto pilot when I opened the door and stepped inside, my cock already bulging against my pants.

She saw me walk in, my pants tented from my hard cock. She quickly pulled her hand out of your panties and tried to cover herself with her blanket. I got to the bed and my instinct of making girls my cum sluts took over. I yanked the blanket from her hands, exposing her breasts and making her feel even more vulnerable. She looked at me with a mix of fear and excitement as she set topless in front of her sex crazed brother. She let out a small yelp when I grabbed her and pulled her to me. I forced my mouth onto hers as I undid my pants and let them fall to the floor. I took off my shirt and threw it aside. She was scared but began to get excited when she saw the big 8″ bulge in my underwear. I pulled her closer and put my mouth to her nipple. I began biting and sucking as she tried to push me away.

“No, no, you’re my brother, stop” she exclaimed as I worked my mouth on her tits.

I reached down and ripped off her panties, I threw the ruined clothing to the corner. I reached down and stuck a finger in her pussy. It was wet enough that I could tell she was excited. I quickly removed my underwear, exposing my large cock. She tried to push me away again, but accidentally brushed against my cock. Her excitement caused her to grab it. It twitched at her touch. I stood over her and grabbed her head. I pushed her towards my hard member and forced her to take it in her mouth.

She resisted at first. She pushed against my legs, trying to get my cock out of her mouth. I was too strong and kept thrusting into her mouth, pressing the head of my penis into her throat. She was getting wetter and wetter and soon her desire took over and she closed her lips around my shaft. She swirled her tongue around the head as I kept thrusting into her mouth. I had to give her credit, she was pretty good at sucking cock. I moaned with pleasure as my sister sucked my hard cock. She begin to finger her bare pussy as she worked her lips up and down my shaft. Her other hand cupped my balls. I began to moan louder and louder. She felt my balls tense up and my cock stiffen even more as I shoved all of it down her throat. My cock spasmed in her mouth as I cummed, depositing it down her throat. She gagged but I held her head all the way down on my cock. She swallowed shot after shot of cum, and I watched as some dribbled down her chin. I pushed her off my still hard cock and roughly shoved her onto the bed. I climbed between her legs and put my lips to her pussy.

My lips met her pussy and my tongue flicked out to taste her wetness. She was already close to cumming as I roughly plunged two fingers into my sister’s tight pussy. She was immediately filled with a mix of pain and pleasure. My tongue flicked at her clit as I fingered her and my other hand reached up to squeeze her breast. I pinched at her hard nipple as my fingers kept thrusting into her. She began to cum as my tongue lapped at her juices. She moaned with pleasure and ground her pussy against my face. She was in complete ecstasy as she came from her brother’s tongue and fingers. She yelled my name as her orgasm reached it’s peak. I removed my fingers and pushed my tongue inside of her so I could taste all of her juices. As her orgasm subsided I continued licking, making sure I got all of my sister’s juices. I came up from her pussy and kissed her, she could taste her pussy on my lips. She ran her hands all over my back and felt my once again hard cock rubbing her soaked pussy.

As her orgasm fully subsided she briefly came to her senses. She began to panic and tried to push me off of her. I was too big and held her down, my cock precariously close to penetrating her pussy. She scratched at my back and chest, but the lust for my sister kept me on top of her.

“No, no, don’t,” she screamed even though an increasingly large part of her wanted to feel the size of my cock inside of her.

Suddenly I thrusted the entirety of my stiff cock inside of her. She instinctively moaned as she took all of her brother’s cock for the first time. Her scratches on my back turned into grasps as I thrust in and out of her. It hurt with pleasure as her pussy took the biggest cock she ever had. I began by thrusting slow but hard and deep. Over and over again I explored her insides with my cock, pushing it deep inside of her. Her tight pussy clinched around my cock as the pleasure took over her body. She pushed her hips against mine, trying to get me deeper and deeper. I started to thrust faster and harder as she felt another orgasm begin to take over her body. She yelled my name and moaned as the orgasm swelled inside of her. Her muscles spasmed and her limbs tingled as she cummed harder than she ever had.

“Oh sis, oh sis, oh shit, I’m going to cum,” I yelled while moaning.

She felt my cock spasm inside of her as my cum shot deep inside her pussy. The rush of cum pushed her orgasm over the edge and she was enraptured in euphoric ecstasy. She called out to me and ground her hips into me. She felt a mix of her brother’s cum and her juices drip around my cock and out of her pussy. I gave a couple more thrusts, depositing all of my cum inside of her. She layed there, unable to move after all the pleasure and excitement. I pulled out and even more cum dripped out of her pussy. I stood up and looked at her ravaged body on the bed. My sister, my fuck toy, my cum slut. I used her ripped panties to wipe the sweat off of my face and chest and lightly tossed them onto her stomach. She just layed there, thinking about what happened. She looked pleased and scared. She felt euphoric and used. She didn’t know what just happened or what would happen next. All she knew is that she was already feeling a hunger for her brother’s cock and cum. She started crying.

I wasn’t done, I had to make sure she was my new cum slut. I grabbed he by the hair and pulled her to a sitting position on the bed. I pulled her to my still stiff, cum covered cock and forced her to take it in her mouth to clean it. I watched as she cleaned off my cock. Her tears ran down her cheeks and onto my hard cock. I know it’s kind of sick, but I love seeing a good cum slut cry. It makes it feel all the sweeter. She tasted the mix of cum, sweat, and tears and tried to tell herself you don’t like it, but she couldn’t ignore how wet her sore, cum filled pussy was getting. She didn’t want to like this, being forced to clean off her brother’s cock, but she knew she. She couldn’t stop crying as I pulled her hair and forced her to clean me off with her tongue. I forced her to lick all the sweat and cum off my balls. I decided that I was clean enough and pushed her head away. I made her stand up and face me. She was still crying and couldn’t look me in the eyes. She was both excited and ashamed of being her brother’s new cum slut. My face appeared stoic and emotionless. We were both breathing heavy, but the only sound was her sobbing. She was scared and wondering what I’d do next.

Suddenly I grabbed her and spun her around. I pushed her down to bend her over the bed. She yelped in fear at the suddenness of the action. My cock was fully hard again and I shoved it into your sore, cum drenched pussy. She was immediately turned on again and pushed against me to get it deeper. I only gave a couple of thrusts before pulling out. She felt me line my hard cock up to her ass. As it touched her ass cheeks she felt the wetness of my cum and her pussy juice that covered my cock once again. I slowly pushed into her tight ass. I could tell by her tightness and he cries that she’d never taken a cock there and the pain was almost unbearable. “No, don’t, please, brother, not my ass” she said through tears as she reached back to try and push me away. Her pleading and pushing made me want it more and I suddenly and violently thrust all of my cock deep into her ass. She screamed in pain and began to cry louder as her brother’s cock stretched her ass. I thrust hard and deep, getting faster with each push. She began to enjoy it through the pain as her ass loosened to accommodate my hard cock. Her ass was so tight and felt so good around my cock. I had never fucked an ass that felt so good. Soon I felt the need to cum again.

“I’m going to cum in my sister’s ass,” I told her “and you’re going to like it”.

She was scared and unable cum through the pain. She couldn’t answer, but your louder sobs and cries of pain and pleasure are the only answer I needed. I shoved my cock deep inside of her all and she felt my cock shoot cum deep into her ass. I held her against me, shooting all my cum deep into her ass. I pulled out and my cum dribbled out of her ass, down her pussy, and down her leg. She stayed bent over, her only movement being her back and stomach spasms from her sobbing. I threw a towel at her and told her to get a shower so we could meet our friends at the bar. She got up and just before she got to the door I grabbed her hard by the arm.

“From now on you’re not my sister. You’re just my whore and my cum slut. You’ll do what I say, when I say. Got it?” I said into her red, crying eyes.

She was still crying and couldn’t speak, but she nodded to reply. She now knew she was mine. She was no longer in control of her pussy, her brother was. She had never been happier or felt more used than at this moment. She got into the shower and I got out my phone to text our friends. I was going to make sure Kristen got a great introduction to being my cum slut…