I lie there in my bed, bewildered by the events of the last 30 minutes. A young woman from my own family just woke me from my sleep in the best possible way; by giving me my very first blowjob. I can recall the feeling of her lips smoothly sliding up and down, up and down on my throbbing length. I relish the recent memory of the soft suction of her mouth and the delicious slippery dance her tongue delivered to my sensitive tip. Shit, I'm getting hard again.
She hid her face and most of her body under my blankets. The only part I got so good look at was her panty-clad butt, sexy and curvy and womanly in the dim light spilling into my room from the hallway's night-light. She wore panties with dark hearts on them, but I hadn't been able to determine the color. I was too distracted by the pressure and pleasure rising in my groin to notice more.
She took my cum in her mouth, and I could still almost feel her mouth sucking harder, her throat clenching as she swallowed, the whimpering and the obscenely sexy wet noises her mouth made taking all of my load into her stomach. I had never come so hard, and now lying in bed afterwards, I'd never felt so satisfied.
She darted from the room shortly after making me cum. I didn't seen any useful identifying features of her body when she left the room. All I could tell was that she was a nicely shaped young woman. That didn't help me. All three of my sisters were nicely shaped young women. Yes, I had noticed. I was a teenage boy after all, and they were teenage girls. They were very, very fine examples of teenage girls.
I needed to solve this mystery. One of my three sisters had just snuck into my room in the dead of night and spent the last half hour sucking her brother's cock, and I really didn't want tonight to be the last time that it happened. One of my sisters was a very naughty girl, with a very skilled mouth. I needed to know who it was.
I have three sisters. One a few years older, one a few minutes older, and one a couple years younger. They are all good looking, and they all have sexy bodies. By coincidence, my older sister is smaller than most, and my younger sister just had a growth spurt, so they are all close to the same size. I am a few inches taller than all of them and getting taller.
My oldest sister, Elise, is definitely the sexiest of the three. She has been in college for a year or so, and despite her petite body there is no doubt that she is a grown woman. She has pretty blonde hair that runs straight down to the middle of her back, and her features mirror those that you see in magazines. Her trim, athletic figure is accentuated but long runners legs, breasts that were more than a handful (I imagined) and a butt that had benefited from several years of dedicated yoga workouts. Elise's movements have the natural sexy confidence of a woman who knows the effect she had on the men around her, and was comfortable with it. Even as her brother, I have not been immune to her natural charms, with memories of her yoga poses providing fuel for my masturbation sessions.
Elise cycles through boyfriends every few months and I had heard rumors about some of the things that she did with them. Boys talk, and while it is strange to hear about the sordid adventures of my own sister, I'm not about to stop listening when people were talking about sex. I have heard that she gives amazing head, and that she deep-throats like a champ. I also know that she is a bit of a tease when it comes to going further than a blowjob, but she's so good at blowjobs that the guys don't mind. I don't think brothers should know those things about their sister, but I do. My jerk-off material includes some of those stories, but with me taking the place of the lucky jerks she goes out with.
The next sister down is my twin, Tasha. While she is my twin, she and I are very different. She is bubbly and outgoing while I am shy. She has many friends while I have a select few. She struggles in school while I have a fairly easy time. Despite our differences, we get along splendidly and make a good team. She always greets me with a big smile and an occasional hug, though to be fair she does give everyone a big smile and an occasional hug. We are both good listeners so conversation comes easy. She is a good sister, even though she insists that she is my BIG sister. In my opinion, 13 minutes of age does not make her my senior.
Tasha is undeniably cute, with her small upturned nose and dimples on her cheeks. She keeps her naturally curly brown hair loosely tied back, and wears comfortable clothes that hide most of the interesting parts of her body. The only hints I have that she has an amazing body underneath have been accidental peeks that I occasionally get of her walking from the shower to her bedroom every night in a towel. Her breasts fill the towel out more than I would have thought and her legs are fantastic, with womanly curves that hint at what might be hidden just out of sight under the edge of the towel.
Finally, my youngest sister Lydia is best described as a bookworm. Everywhere she goes she is reading from a book, or an e-reader, or from her phone. While other girls her age are hooked on TikTok, Lydia is studiously reading a blog post or an article or a novel. Her personality reinforces this; she is shy and quiet, rarely speaking unless spoken to first. She excels at her schooling, easily achieving top marks in her classes. She even joined a program at school tutoring other students during the day. I have no idea how she is able to do that if she's as shy as school as she is at home.
Over the last few years Lydia has blossomed into a beautiful and sexy young woman, but she doesn't appear to realize it yet. Her breasts have filled out to an appealing plumpness and her bottom has taken on the curviness of a teenage vixen. She was always a cute girl, but now her face has matured, becoming less girly and more slender and defined with plump naturally-pouty lips, almond-shaped eyes of a striking blue color, and a shape that will earn her a lot of attention. Though her body has changed she hasn't changed her habits, much to my delight. Her pajamas are still loose and thin, almost sheer, but now they cannot hide the treats she has underneath. Her naturally perky teenage breasts need no bra at night, and they must be cold because her nipples are always prominently poking out the fabric. I can see the outline of her breasts and her trim figure through the fabric when the light is just right, though I try not to get caught looking. She wears her loose and comfortable short shorts underneath the top, exposing her long legs to my horny gaze. She is a visual delight for an aroused teenage boy like me and Mom and Dad would quickly make her change if they saw what she prances around in after her shower, but luckily they never come upstairs after showers ever since we became too old to tuck into bed every night.
I am rock hard now, again, despite being drained recently by one of these girls. Slipping my boxers down, I start stroking myself under the blankets, my mind full of imagined scenarios with one or more of my three sisters naked in bed with me. Elise's body bounces up and down on my cock in time with my strokes, her bare breasts jiggling delightfully each time her warm, wet pussy fully engulfs my length and bottoms out. Lydia on top of me, the whole length of her nubile teen body pressed against mine as her hips rock, slipping my cock in and out of her tight pussy. I replay the sensations from earlier in the night, feeling my sister's mouth engulf my cock over and over, milking me until I cannot take any more.
Grabbing a tissues from a box on my nightstand, I fill it with a full load of my seed, grunting in pleasure a little louder than I intend to. I rest a minute in the post-nut afterglow, then pad to the bathroom to dispose of the tissue and relieve my bladder.
Passing Lydia's bedroom door, I catch movement and light through the barely open door from the corner of my eye. I stop and drop down, peering into my little sister's room at ground level where i'd be less likely to be noticed. In the dim light, I can see the flow of Lydia's e-reader. It looks like she's just reading a book, but I continue to watch. It's hard to make out, but her blankets are down below her waist, and her legs are visible, spread out on the bed. One hand holds the reader, while the other is resting on her stomach.
