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My Sister’s Baby.
An erotic short story by Darius Thornhill (mf, incest, impregnation.)
I know it’s corny but my little sister Emmy really was frightened of
storms. If she heard thunder or saw a bright flash of lightening she would
run and hide, or if it was at night she’d crawl into our parents bed to be
comforted. That’s fine when your six, but not when you’re 12 or 13 and
starting to display some of the teenage charms that will develop into a
fully rounded and nubile body by the time you’re 16. It was inevitable
that my parent’s would ban her from their bed as being ‘inappropriate’.
Emmy didn’t really understand why. She pouted and complained at the change
and the meanness of our parents. She was too young to understand the
temptation my father might have felt when feeling a smooth-bodied and warm
young girl next to him in bed. I can sympathise with him. Explaining an
erection to your young daughter and your wife would not be a fun thing to
do. I understood more than she did but I still couldn’t really explain it
to her apart from telling her she was a big girl now and big girls aren’t
afraid of storms. But the problem was, as any child psychologist will tell
you, that didn’t change her anxiety, it just suppressed it.
We don’t live in a particularly stormy place, just a few a year so the
problem of a big storm at night didn’t crop up for maybe 2 or 3 years.
Emmy was nearly sixteen, a few weeks off her birthday and I was 18 when it
hit. I was awoken by a window shattering explosion that seemed to be
directly over the house and intense flashes of lightening as a major
electrical storm passed over us. The dim light of my bedside clock
flickered and went out as the power went down. Seconds later my bedroom
door was flung open and Emmy dived into my bed and under the covers and lay
there whimpering and shaking.
“Emmy, it’s all right, it’s just an electrical storm, it’ll pass over in
a few minutes, you’ll be OK.” I tried to reassure her. But it didn’t. The
storm stalled over our area and the banging and crashing went on all night.
Emmy grabbed my arm and pulled me close behind her so I lay with her cute
little bottom nestled in my lap. The warmth of her astounded me. It was
the first time I’d been in bed with someone else. I could smell the subtle
fragrance of a young girl. I was fascinated, but mainly I was concerned
with Emmy who jumped and shivered every time the lightening flashed or a
thunder cloud rumbled it’s threat of annihilation.
Now, I know what you’re thinking. You think she turned me on and either
I seduced her while she slept or she felt my cock get stiff and she got
curious, and in either case we ended up having sex and bingo, we’re having
the interview with the parents about how Emmy came to have her brother’s
baby growing in her cute belly. Well it didn’t happen like that. How
could it? Emmy was terrified and I was very concerned for her. Eventually
the storm did pass and we both fell into an exhausted sleep. Our parents
found us there in the morning innocently cuddled up like we were 6
year-old’s. Nothing of a sexual nature had happened. We were after all
wearing pyjamas so there was no direct skin to skin contact. But… and
isn’t there always a but? The experience had left me with the knowledge of
how it felt to have my sister’s warm and nubile body close to mine, and I
couldn’t get that thought out of my head. I had tasted of the forbidden
fruit, well not really tasted, I had just sensed the aroma of the lusty
fruit and gladly let it permeate my body. I couldn’t forget the lovely
feeling of her against me and the smell of her close to me.
After our parents found us we had the ‘lecture’ about how we should stay
in our own beds in future. They did their best to make it clear what the
dangers where without actually saying ‘you may have sex and Emmy could end
up pregnant’ but the implication was obvious to both of us. We knew very
clearly where babies came from. But knowledge doesn’t always protect you
does it? You need common sense and self-control to support that knowledge,
two qualities that are largely absent from most teenager’s characters,
especially where sex is concerned.
After the ‘interview’ Emmy came into my room and sat on my bed.
“Thank you for looking after me last night. I know it’s silly but I am
petrified and I just can’t help it.”
“It’s OK Emmy. I understand, I really do, and I don’t mind. But listen
if it happens again you need to make sure you are back in your room before
they catch us.”
Emmy said “You’re a star Chris.” and gave me a kiss on the cheek. That
aroma again… what was it? Perfume? No I didn’t think so. Maybe it was
just her, how Emmy smelled. One thing I did know is that I liked it. She
smiled at me. “I felt safe last night. You made me feel it was all going
to be OK.”
I admitted to her that it ‘felt pretty neat cuddling like that’. She
scooted up the bed next to me, lifted my arm round her shoulder, rested her
head on my neck and said ‘yes it was pretty neat’. There was a tension in
the air that strangled my vocal chords. I heard my voice croak ‘any time
is OK with me’. She whispered ‘I love you big brother, thank you’.
And so it happened that I invited my sister into my bed. Did I know
then what I was doing, what I wanted? I’m not sure. It’s hard to say what
motivates you, but I see now that I did want to feel her close to me again
and that maybe I should have recognised that feeling for what it was.
Nothing happened between us for a few weeks but the knowledge was there,
a little sweet thought that tickled me and bided it’s time. We were closer
now in subtle ways. She was more comfortable being close to me and would
always give me a more than sisterly hug in the morning or when we hadn’t
seen each other around. I noticed she was more comfortable with me when
she was walking round the house in her bra and panties, but that she never
let our parents see her in that state of undress. I was very happy to see
her neat bottom and firm little breasts encased in her favoured flowery
underwear, and sometimes I’d feel her breasts brush against me as she gave
me my ‘good morning’ hug. We talked more than we had before and we spoke
about more personal things like what we hoped for our futures and who was
seeing who at school, but not anything sexual.
Emmy’s birthday came and went with a house full of giggling and
shrieking teenage girls and still nothing happened. Then our parents
decided they wanted a second honeymoon. They announced we were old enough
to look after ourselves and that they would be away for two weeks. “Aunty
Liz will look in on you and you can call her or us if you need to.”
The car door slammed and with a final ‘don’t forget your homework’ our
parents were out of our lives for two weeks. Great! Freedom! We didn’t
want wild parties, just a few friends round now and again and space to be
ourselves, to make a mess and sleep late at weekends, simple stuff really.
And then there was that sweet little tension between us. Emmy felt it too
because when we decided to go to bed that evening she hesitated and looked
“What’s up Em?” I asked. Still she hesitated. She looked at me and
shrugged, an unasked question hung there. I suddenly knew what to say.
“Said on the news there might be a storm tonight….” Her face lit up with
a big smile.
“Does that mean…?”
“Yes if you want to.” My throat was dry. Emmy got undressed and put her
pyjamas on in her room and then padded down the landing and peeked round my
door to make sure I was ready. I was sitting up in bed reading wearing a
cotton t-shirt and shorts. Emmy had pretty white and pink knee length
bottoms that were tight across her bottom with a loose cotton top under
which her breasts moved as she crossed the room. She looked happy as I
lifted the covers and she slipped into my narrow bed. She snuggled up and
asked what I was reading. I showed her and she asked me to read to her
like I used to year’s ago. So there I was with my warm and cuddly sister,
her head on my chest and her arm around my waist reading D. H. Lawrence’s
‘Sons and Lovers’ one of my school set texts. I didn’t find it too
interesting – Victorian novelist describe such uptight characters – and Em
soon said ‘boring!’ and flicked the book out of my hands and onto the
floor. I giggled and tickled her waist and she jumped and wriggled against
me which felt very good. We lay still again and I reached over her to put
the light out, stretching past Em’s head and pressing myself against her
and feeling her breasts against my chest. I breathed again that subtle
aroma she had, and felt quite strange, elated, confused.
We settled down in the bed with Em again curled up on her side with me
lying behind her, my arm around her waist. She wiggled and fidgeted for
ages until I said ‘Em! Lay still.’ ‘I can’t’ she said.
There was a moments silence before she said “Because….” and then I
felt her throw back the covers and pull me out of bed. “Come with me.” she
said firmly and led me to the door of our parents bedroom. Inside, the
large bed was half lit by the light coming in the window in a soft blue
glow. Em pulled the covers aside and pulled me in after her. This time
she faced me and cuddled up along my side.
“There,”she said. “That’s better isn’t it?”
“Em….?” I breathed the question as she pressed her warm young body
“Yes.” was all she had to reply, not a question but a statement,
permission, encouragement. We both knew it then.
I could feel her breasts and her warmth, exquisite and stimulating
beside me. And something else too in this big bed, this wide landscape of
adulthood, this taboo place where strange and half-understood rites took
place. I felt mature, confident. Knowledge lifted me, encouraged me. It
seemed perfectly natural that I kiss Em gently on her soft and willing lips
as I’d seen my father kiss my mother many times. It felt right that she
kissed me back opening my lips with her tongue. It was absolutely right
that we turned and pressed our bodies to each other, her breasts against my
chest and my growing cock pressing against her tummy. When her hands
slipped under my shirt and pulled it up, I easily reciprocated by pulling
her top up and exposing her breasts so I could feel them naked against me.
Our kiss never stopped as she rolled on top of me and held my head in her
hands while she sucked my tongue deep into her mouth, a clear and
instinctive invitation. My hands stroked down her back and under her waist
band to hold her bottom cheeks and press them to me. Following her
instinct she opened her legs and straddled me so my cock felt the heat and
the need in her vagina. Fabric ripped as I pulled her pyjamas apart
exposing her naked cunt. She frantically pushed my shorts down freeing my
rampant cock and then as easily, naturally as if we’d done it many times
before we both positioned my cock in the entrance of her cunt and she slid
down onto it helped by my hands pulling her hips. The smooth tightness of
my sister’s virgin cunt closed over and around my hard cock, resisted for a
moment and then opened for me allowing me to deflower her. My sister gave
me her virginity and I gave her mine in the ultimate taboo embrace. At the
same moment we both started moving against each other so my cock slid up
and down inside her. She never stopped kissing me or moving against me as
I rolled her over onto her back and started to drive my cock harder into
her eager young cunt. Em lifted her legs, opening her tightness and
encouraging me to penetrate more deeply while her hands pulled my hips,
asking me, telling me to go deeper, harder. And still we held that first
incestuous kiss. My hands held hers above her head as I entered her faster
and faster. My body felt pent-up, full and hers felt lithe, nubile, ready.
She exposed her body and soul to me, her need calling to mine. For minutes
we held each other tight while we worked ours bodies as one, climbing with
passion, need towards the dangerous climax. Her moans became deeper, more
basic… but they might have been mine, I couldn’t tell. Her body became
suddenly rigid and clamped itself round me as my pent up feeling crested
and my cock poured my incestuous seed into her, just as her body became a
thing of primitive beauty, bucking and spasming, milking my cock of every
last drop of sperm in great waves of passion. We subsided slowly into a
series of longer, slower penetrations. At the deepest point of each
penetration my cock gave out another little spurt to make sure my balls
were empty and her vagina squeezed a few more drops out of me. And still
we held our first incestuous kiss.
Eventually we relaxed into a series of small kisses and giggles at what
we’d done, Em looked so bright and happy in the half light as I looked at
her. She smiled up at me, her naughty vagina still giving me little
squeezes. At exactly the same moment we both said “I love you.” to each
other and kissed again. An adult kiss of care and reassurance, of enduring
I smiled down at her. “We didn’t use any protection Em.”
“I know.” she said, her eyes shining.
“You might be pregnant.”
“I hope so.”
“Shall we make sure?”
So we fucked again and again… Four or five times that night I filled
my sister’s hungry little cunt with my potent seed – just to make sure she
was impregnated, that our baby would start to grow in her womb.
We did manage to get to school the next day, but as soon as we had
finished we were back in our parents bed, romping naked, fucking and
playing, laughing and giggling, free and carefree. We talked of the baby
that might be growing in her belly. The very thought of that made me want
to be inside her again and Em was always ready for me to enter her.
For the next few days we carried on like that. We took to being naked
all the time so that if Em or me said “We’d better be sure…” we would
have sex then and there – in the kitchen, the lounge, wherever we happened
to be. But the best was still waking up next to Em in the mornings after a
night of baby-making fucks and seeing her lying there safe and secure
happy, loved by, and in love with, her brother. I would watch her sleep,
knowing that soon she’d wake up and we’d have sex again before we got up.
For two glorious weeks we tried as hard as we could to make sure Em was
pregnant, fucking at every opportunity, always with my cock in her vagina
so as not to waste my sperm. Em could make me make me come six or seven
times a day and we took full advantage of that while we had the
After our parents came back we had to be a bit more careful, but we were
frequently alone in the house together, and even if it was for a few
minutes Em would sit stride me and milk my cock into her incestuous vagina.
Often she’d creep quietly into my bed in the middle of the night.
Sometimes I’d slip into her bed and her vagina very early in the morning
while she was still sleepy. She always welcomed me with open arms and a
She missed her next period and the one after that, so we were sure she
was pregnant. She glowed and became even randier than ever. Now she was
pregnant she just wanted to find out how many different ways there were of
coming and it wasn’t important where my sperm ended up, at least not until
she’d had the baby and we would want to start fucking for the next one. So
I filled her mouth, her bottom and her vagina as the urge took us.
Sometimes she wanted me to come over her baby bump or her breasts so she
could smooth my cream into her skin. She swore it was good for her
The parental interview was a bit fraught, but we presented them with a
fait accomplis and it was obvious that this wasn’t an accident, that we had
both chosen this course of action. I think it must also have been obvious
that Em and I loved each other on a plane above that of usual filial love.
We did agree to keep our incestuous relationship quiet at least until we
had left school which seemed fair enough. They were a bit nervous when we
asked for a double bed to be installed in my room and Em to move in with
me, but as we pointed out, we’d soon need Em’s old room as a nursery. They
agreed and eventually came to accept seeing us in bed together and kissing
each other like the lovers we were. Mum became quite supportive as her
first grandchild was due.
I loved it when Em was pregnant, and couldn’t wait to impregnate her
again as soon as possible after one of our babies was born. I loved the
feel of her bump as it grew from day to day and the way my horny little
sister became randier than ever. I love the smell of her body and the
taste of her vagina when she was pregnant and nursing. I like to take my
turn at her breast when the baby was satisfied and asleep.
We have four lovely, healthy, happy bouncing babies now and a fifth due
in a few months. As I write this Em is smiling across at me while our five
year-old boy is trying to play with her naked nipples. He’s absolutely
fascinated by his mum’s naked body. Like father like son! Who knows where
it might lead in a few year’s time. Our two, soon to be three, girls have
two older brothers. I’m sure they’ll all play together as they grow up.
As soon as the babies are asleep I think I’ll ask my sister kneel on the
edge of bed. I’ll pull her panties down round her knees. I’ll breathe in
the aroma of her pregnant pussy and taste the earthiness of her tight
bottom before I stand behind her and slide my cock into my sister’s taboo
cunt. Soon she will be moaning and panting for more of her brother’s cock
and it’s gift of incestuous sperm.
Darius Thornhill Copyright 2007 More at