Stepdaughter grows up
By Aj
A stepdaughter punishes her stepdad after her muscular mother trains her to grow.


"Put this on" she said, holding out a adult nappy. "Oh and these", holding up
a baby bonnet and lacy, shear, see through pink nightie. "You've got to be
fucking kidding" I replied.

The look of anger in my wife's eyes when I spoke back to her was enough to
make the strongest, manliest of men quiver. I was 5 foot 9. Slightly over
weight I came in around 100kg. My wife was 5 foot 3 of shredded muscle.

She had began working out after the birth of our child, which coincidently was
the same time I mentioned to her my love of muscular women. She worked out
every now and then to start with, scared of developing muscles too big as at
the end of the day the love for muscular women was mine not hers. The day she
came home and caught me masturbating on the lounge whilst watching a female
bodybuilding dvd was the day her workout habits changed. She never mentioned
anything she just started working out harder and harder. Longer and longer.

So today when she asked me to dress up like a baby and I answered her back, I
didn't really think I had a chance of not doing what she had asked. It was
mere frustration of being emasculated coming out in me. She'd won again just
with her looks.

I did as she asked and dressed for her. She was obviously very maternal and
very horny. She was rubbing herself and she watched me dress and I could see
milk leaking out of her muscular breasts. My wife saw that I had noticed the
milk and said "Hurry up and dress Baby, you'll be drinking from these in a
minute"

I'd finished getting dress when my wife pushed me down onto the bed and jumped
on top of me. She started rubbing herself on my nappy covered crotch area. My
dick was getting hard and my wife was getting hornier by the second. She
ripped her clothes off revealing her pumped up physique, and her leaking
breasts. She put on to my lips, grabbed the back of my head and held me there
while I drank from her. Surprisingly it made my cock even harder. Never did I
think I would be turned on by this. I drank from her while she flexed her
massive chest under my mouth. Forcing the milk out faster. Her massive legs
were squeezing and grinding my hips and she bore down harder on the nappy.

I was so close to cumming in the nappy it wasn't funny. My wife pulled a
freezer bag out from behind her back. "Put this on baby"

Lately we had been experimenting with different types of asphyxiation. First
it was a cord wrapped and pulled tight around my neck, then a metal dog choker
collar, now the freezer bag. The most dangerous of all.

We found it so hot. On my end the orgasms were indescribably powerful and
intense. On her end it gave her a feeling of power which also heightened her
pleasure.

I put the bag on my head. Through the bottom of the bag I was still able to
breath slightly. My wife was looking down at me from her straddle position.
Through the rustle of the freezer bag I heard her say "I think I'm gonna try
something different tonight baby" And with that she crept up my body and then
slowly lowered her dripping pussy over my mouth, sealing off the plastic bag.

My air was cut off as she ground herself to orgasm on my face. She worked
herself across my lips and nose moaning in time with the rustle of the bag. I
was panicking now, I had been without oxygen for almost a minute now. Each
attempted breath drew nothing but plastic. She finally came with a gush all
over the plastic bag. Just as I thought I was going to pass out I came in my
nappy with a groan and ripped the freezer bag off gasping.

Looking down at my nappy my wife asked with a wink "Want mummy to change
that?"

Sitting at the breakfast table the next morning I couldn't help but stare at
my wife as she ate. She was wearing a satin robe. Her boulder like shoulders
and biceps strained the sexy fabric, every now and then it would slip open at
the middle and give me a glimpse of her ripped, vascular chest. I swallowed
hard thinking about the power she had shown last night. I also had an erection

My wife's two daughters were sitting at the table also eating. The eldest
commented on her mum's physique. "You're getting so huge now mummy. I love
your muscles. Specially those ones in your legs" she said pointing to her
diamond like calves. I wanna grow big muscles like you too one day mummy. My
wife just laughed. "Mummy hasn't even stopped growing yet darling." And with
that she got up, shrugged off her robe revealing her massive tapered back,
tiny waist and tree trunk like thighs. Both me and her daughters gasped and
looked at each other in amazement as she walked into the garage to lift,
wearing nothing but a sports bra and a g-string.

After her workout she came back to the kitchen. The kids were watching tv and
I was cleaning up. My wife was dripping with sweat. She looked so hot. I put
my arms around her and kissed her lips. They were salty from the sweat. Her
muscles moved under my hands as we held each other. I could feel my cock
growing between her legs. She picked me up in her arms like I was a little
baby and carried me into the living room and sat on the lounge with me. She
said to her eldest daughter "Mummy has to feed her baby now" and with that she
pulled her bra out of the way and shoved her sweaty, leaking breast into my
mouth. I tried to struggle and get away but her grip was too strong. I was
forced to drink, it tasted so good.

Her daughter sat there in shock, watching her mother feed her step dad. "This
is what happens when us girls get strong baby. We have to look after little
week boys like your step father. He's a baby. I need to feed him and change
his nappy just like your 6 month old brother. One day you will learn yourself
how much work us girls actually have to do to keep a big baby like this happy"
I struggled again under her breast and for my efforts copped a powerful first
to my stomach. "See baby" she said to her daughter who was looking on in awe.

I was so humiliated. I can't believe my wife just breast fed me in front of
her daughter. I was sitting on the lounge next to her daughter watching tv
while my with showered. I couldn't even look at her I was so ashamed.

"You looked so funny you big baby while mummy was feeding you. You're so much
like a baby I think I could beat you up"

I didn't even answer.

She threw a remote control at my arm "Ow"

She pulled my hair "Ow"

"Cut it out I said or I'll tell your mother"

"Whatever baby" she said as she flicked my ear

"Ow, you little shit" I yelled just as my wife walked into the room

"What's going on?" she yelled

"Nothing mummy, nothing I'm just playing. I was telling my stepdad that I
think I could beat him up and he almost started crying when I flicked his ear.
Sorry mummy" she cowered

"Don't be sorry baby. You're just learning. I know you're strong already,
those years of ballet and athletics have made you quite the weapon. I don't
think you'll be able to beat him up yet without mummy's help though but we'll
get you stronger and then you'll have no problem beating him up."

"But mum I am strong enough" my stepdaughter said as she flexed a lemon sized
bicep.

I gulped. I was surprised to see exactly how strong she really was. Like her
mother said she'd done hours in the gym since she was 12 doing gymnastics,
dance and then also when she moved onto athletics. She was already muscular
for a girl her age. God help me if she took after her mother.

I arrived home from work with some news for my wife. I was being sent
interstate to help set up a new branch of our company. I would be gone six
months. My wife was used to it, hence why she is so damn muscular. She had
nothing else to do while I was on the road but work out. Working herself into
a powerful muscle goddess. "Honey I'm home" I said as I walked through the
house. No answer. I went into the garage where my wife would normally be
working out. When I opened the garage door my jaw dropped.

There was my wife wearing a small black sports bra and boy leg shorts. Sweat
covered her rippling bronzed body. That isn't what made my jaw drop. My wife
was standing behind my step daughter. She was wearing exactly the same outfit
as her mother and as I watched her she was pulled herself up on the chin up
bar with ease. My wife standing behind her as a spotter kept count. "12, 13,
oh hi Honey you're home. Keep going to 15 darling she said to her daughter he
only grunted a reply"

Sweat was dripping down the crevice of her back, running down the smooth
tanned skin and stopping at the soaked bank of her workout shorts. Her ripped
shoulders ballooning every time she pulled herself up on the back. A nice v
taper starting to develop on her young muscular back.

My stepdaughter, dropped from the chin up bar and looked at me with a grin.
"Won't be long before I'll be wrapping these babies around your neck" she said
as she flexed her growing biceps.

I gulped again. "Honey we have to talk" I said dragging my wife out of the
garage and into our bedroom.

When we got into the bedroom my wife pushed me onto the bed and started
undressing me. I tried to object but she merely punched me in the face and
told me to shut up. When I told her that I had some important news she looked
at my rock hard dick and told me that it could wait until she taught me a
lesson. She new my dick was hard from watching my step daughter do chin ups. I
couldn't argue with that.

My wife kissed my bloody mouth and tore off her sweaty workout clothes. She
slowly lowered her muscular body onto my rock hard cock and started working up
and down. As she milked my cock between her muscular legs she flexed her
massive pecs and biceps and instructed me to fell them. I massaged her
shoulders and biceps and ran my hands down her flared lats to her tiny waist.
There I held on and she started to grind faster and faster. My wife saw the
look in my eye that told her I was about to come. She squeezed tight with her
powerful vagina muscles trapping my cock and preventing me from cumming. I
yelled out in pain and started punching at her thighs. She started to laugh.
The more I punched the more she got turned on and squeezed my cock. Finally
she squeezed so hard that she came. Her cum poured out of her all over my cock
and down my leg. Relaxing my wife put her hand around my throat and started
grinding again. I couldn't breath. I ended up cumming a split second before I
passed out.

When I woke up my wife was lying next to me admiring and feeling her own body.
"What was your news my love?" she asked

I had been away 6 months now. I missed home so much. I missed my wife and my
family a great deal while on the road. I spoke to my wife almost every night.
Many nights I fell asleep in my hotel room with her soft, smooth and sexy
voice in my ear. Every now and then she would give me updates about how much
bigger she'd become and how muscular her thighs and back and biceps were from
extra working out, due to me not being there.

She would also, every now an then give me a hint regarding what sort of
progress my stepdaughter was making in the muscle department. My wife would
drop hints like, "I had to go out and buy her some new clothes today because
her old ones didn't fit" and that "I had to go to the store to buy more weight
plates today because all the plates in the garage still weren't giving US
enough of a workout"

When I arrived home I opened the door to find the house empty. I was so tired
from my trip I headed straight for the shower and to bed. I awoke at 1am. The
side of the bed where my wife normally sleeps was still empty. She must be
still at her mothers I thought. After all I had come home a day early.
Strangely though I could feel a presence in the room. I couldn't see as my
eyes were still adjusting to the darkness. I didn't see the punch coming.

I saw stars as a powerful fist caught me on my eye brow and split it open. I
was dazed and could feel blood running down my cheek. "Ssshh" said a voice.
Firm hands started undressing me. I groped at my attacker and felt nothing but
solid, rock hard, veiny muscle. My cock instantly grew hard as I ran my hands
over the muscular monster that was straddling me. I almost blacked out as
another punch came out of the darkness and connected with my mouth. A tooth
was knocked out and the taste of blood ran down the back of my throat. The
muscular goddess, my wife I was assuming was rubbing herself up and down my
body. Squeezing and flexing phenomenal muscles. I could feel the heat from
between her legs hovering over my cock. I was so wet from anticipation.. Her
lips touched mine, she lowered herself slowly onto my cock. I felt a gently
hand cover my mouth so as to keep my quiet.

I rocked my hips in time with my attacker. She ground on my cock and flexed
her muscles around me. I came close to orgasm when she flexed and blocked me
from cumming, painfully. This went on as my body was twisted and crushed
beneath her muscular frame. Fists lashed out of no where. Breaking my cheek
bone and crushing my ribs. One powerful blow landed on my stomach causing all
the air to be knocked out of me. When that happened my attacker put her hand
over my mouth and nose preventing me from breathing in.

I came.

She came.

The door opened.

My wife stood in the door way. I blinked and rubbed my sore eyes, trying to
adjust to the light. My step daughter, still sitting on my cock, blood
covering her fists looked down at me and smiled. "I take it you like my new
body" she said as she flexed two massive 17 inch biceps. "I told you I'd hurt
you one day. Welcome home" she said as she got off. She walked naked out our
bedroom door. Exchanging looks with my wife as she walked past. Clearly In 6
months she had out grown my wife in musculature. She was a goddess. She made
my wife look like a light weight. I thought my wife and her were going to
exchange blows but when my step daughter raised her fist to lick the blood off
it my wife cowered.

My wife came into the bedroom and lay next to me. It was my turn to cower
thinking that I was going to be punished for what just happened.

That's when I noticed my wife's swollen lips and blackened eyes.

That's when I fainted.