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My Sister Mary Chaps 3-4 (mf inc) 

My Sister Mary 
 
by MikeyBear 
 
Chapter Three 
 
   Two weeks passed until we had a chance to meet again in the 
treehouse.  Mary had spent a week at church camp, and the following 
week I had taken my turn at the camp.  Since I was the only one at the 
camp from my area, I was able to brag that I had touched a girl's 
pussy.  I just didn't tell anyone that it was my little sister's.  I was the 
stud of the camp, and had even gotten one of the girls to go the lake 
with me for some making out.  Daphne had let me tongue kiss her and 
even let me feel her small breasts through her blouse and bra.  But 
when I had tried to unbutton her blouse to get inside she stopped me 
and told me she wasn't that kind of girl. 
   On the night I got home, I was taking a shower in our shared 
bathroom when the door quietly opened and Mary peeked in.  "I've got 
something to show you," she said, "but it will have to wait until 
tomorrow."  I was standing in the shower after cutting off the water, 
and Mary was looking at my shriveled cock.  The memories of our last 
encounter in the treehouse flooded back into my mind and my dick 
began to grow.  We heard a knock on my door, so Mary quickly 
jumped back into her room and closed the door.  Mom walked in 
bringing some clean clothes.  I quickly shut the door to the bathroom 
so she wouldn't see my hard-on.   
   Just after lunch the next afternoon, Mary and I headed for the 
treehouse. Mom was putting David down for a nap, and told us to play 
quietly so we wouldn't wake him.  As Mary climbed the ladder above 
me, I looked as usual to see if I could see her panties up the leg of her 
shorts.  I saw a quick flash of pink cotton just before she scurried into 
the door of the treehouse.  As I climbed in the door, Mary was pulling 
the blankets and pillows out of their box and spreading them on the 
floor.  As I sat down on a blanket, Mary unzipped one of the pillow 
covers and pulled out two thin paperback books that she had hidden 
inside.  "Kimmy found these in a trash can at camp," she said 
excitedly as she handed them to me.  The Wedding Night was the title 
of the first one.  It was a slim book with a white cover.  I opened it and 
looked at a picture of a woman in a long white gown.  "It's all about 
sex and stuff," Mary said.  As I flipped through the pages, I paused to 
read occasionally.  The book described how a "modern woman" should 
react on her wedding night.
  "Your first session of intercourse may be painful, as the hymen must 
be torn before your husband's penis can be fully inserted into your 
vagina," read one passage.  "A small amount of blood may appear as 
the hymen is broken."  It went on to describe the entire sexual act.
   "Did you read this?' I asked as I flipped through the pages.  'Yeah, 
Kimmy and I read it at camp and she let me keep it."  Kimmy was our 
cousin who lived across town.  She was the same age as Mary. "It 
sounds kinda scary," she said, "but it says it's all natural and you 
should learn to enjoy it."  I set that book down and picked up the other 
one.  There was a picture of a girl in a nurse's uniform on the front. 
Her top was unbuttoned and her large breasts were spilling out of her 
bra.  Night Nurses was the title.  I recognized this as a "fuck" book.  I 
opened it up and began to read.  "Gwen tensed as Doctor Bob ran his 
hand under her skirt and up to her soft ass cheeks," I read aloud, "His 
finger slipped under her panties and found the wet furrow of her 
soaking pussy."
   I could feel my dick harden as I read a few more lines.  "Gwen 
dropped to her knees and began to loosen the drawstring of Doctor 
Bob's surgical pants," I continued, " She pulled his scrubs over his 
hips, revealing his massive nine inch hard cock.  She began to kiss 
and lick the purple head, pausing occasionally to take the length of it 
into her mouth and down her throat." 
   By this time, my own swollen cock had formed a tent pole in my 
shorts.
"You're all hard again," she said as she stared at my crotch.  She 
leaned over and put her hand on my hard pole.  She looked at me and 
asked, "Can I make you spit again?"  " The word is cum," I said.  I 
quickly pushed down my shorts and underwear as Mary grabbed on to 
my five inch hard-on.  I laid back on the blanket as Mary stroked up 
and down, using some of the pre-cum that appeared on my cockhead 
as lubricant.  I could feel the sperm start to boil in my balls as she 
jacked me off.
   "Hold on a second," I said, putting my hand out to stop her.  I slid 
my hand up the leg of her shorts to her panties.  "You're all wet too," I 
said.  "It feels all tingly down there," she said.  I reached over and 
pulled her shorts down off her hips.  Mary sat down and pulled her 
shorts and panties off.  I also started pulling her T-shirt over her blond 
head.  "I want to see what your titties look like," I explained.  Her pink 
nipples were the size of quarters, topping mounds that had begun to 
swell just a little.  The middle of her nipples were the size of a pencil 
and were sticking out.  I reached up and touched one of them, and it 
swelled and hardened under my touch.  "Take your shirt off too," Mary 
said.  I complied, pulling my tank top over my head.  We were now 
both naked except for our sneakers and socks.  (Several years later we 
talked about how we always left our shoes and socks on in case Mom 
called.) 
	Mary laid down beside me, and we began to explore each 
other's body.  I was fascinated by her nipples, which had hardened into 
pencil size nubs about a quarter-inch long.  I bent down and 
tentatively stuck out my tongue and began to lick at one, as I had seen 
in my porno pictures.  I gently took it into my mouth and began to 
suck on it, much like I had seen my little brother nursing at my 
mother's breast.  The tiny pink bud seemed to stretch another quarter-
inch before I switched to the other nipple.  Mary's hand pulled me 
against her chest as I licked and sucked at her nipples until they had 
turned a dark red color.  My free hand was moving up and down 
Mary's back until I finally settled it on her firm rear end.  My hand 
slid down the crack of her ass until I found her wet pussy slit.  Having 
no real idea about female anatomy, I began to rub the area around this 
wetness.  I didn't realize that what I was actually rubbing was the tight 
opening to her ass where her juices had run down.  She was squirming 
and letting out small moans as I tried to force my finger into what I 
thought was her pussy. 
	I was beginning to wonder how a man could get his dick into 
such a tight opening when her sphincter eased up and my finger slid 
into the tight rosebud.  Mary gasped, "That's my pooh hole," as my 
finger slid all the way in.  I quickly pulled my finger out in horror and 
began to wipe it on one of the blankets.  "It's OK," she said, "It really 
felt strange, but good." "Will you do it again?"  I moved my hand back 
down to her ass and began to probe at the tight hole again with my 
finger.  The muscle eased and my finger slid back into her ass, which 
was slick with her pussy juices.  Mary squirmed and bucked up against 
me as my finger probed deeper into tight rosebud.  As she pushed 
against me, I felt my steel hard cock begin to slide between her lips of 
her hairless cunny.  Just as I  thought I might slip into her tight, wet 
pussy, Mary reached down and began to pull on my cock.   
	It only took a few seconds, and I was spurting my cum all 
over her belly and cunt.  I sucked hard at one of Mary's nipples and 
pushed my finger as deep as it would go into her ass, squirming it 
around as I pushed.  Mary kind of collapsed against me as I rolled onto 
my back.  We laid there for a minute, my finger still buried in her tight 
butthole.  I slowly started to ease it out, and Mary gave a small gasp as 
it finally popped out.  "That felt really good," Mary said.  We rolled 
apart, and both looked down at our laps.  Streaks of cum covered our 
bellies.  My dick had softened and shrunk, but Mary's pubic mound 
was still red and wet.  I slid my hand down and began to rub her 
bump, which was still moist with her juices.  In about a minute, she 
began to squirm, and soon she arched her back and moaned as an 
orgasm swept through her tiny body.   
   We laid on the blankets for several minutes, my arm around her 
shoulders and her head laying on my chest.  I was softly stoking her 
still hard nipples with my fingers.
   After a few minutes, Mary asked what time it was.  I looked at my 
watch and realized that David would soon be up from his nap and 
Mom would be looking for us.  Mary wiped her belly off as best she 
could with one of the blankets, and we hurriedly got dressed.
 
Chapter Four 
 
That night, after dinner, I helped Dad mow the yard, while Mary was 
busy with Mom in the kitchen. After we had finished our chores, we 
all settled down in the den to watch TV.  Since it was summer, our 
parents let us stay up until 10:00.  After watching a couple of sitcoms, 
a movie came on that Mom & Dad wanted to watch.  It turned out to 
be a love story, so Mary and I were pretty bored.  I was laying on the 
floor reading a book, and Mary was sitting in the recliner reading one 
of her "teen" magazines.  Mom and Dad were sitting together on the 
couch.  Occasionally when I would look over at Mary, I would notice 
that her hand seemed to be rubbing at the crotch of her shorts.   
	At 10:00, Mom sent us off the bed.  I continued to read my 
book until I saw the light in the bathroom go off.  After a few minutes, 
I got up and put on my pajamas and went into the bathroom to pee.  I 
thought I heard a faint moaning from Mary's room, so I switched off 
the light and cracked open the door to her room.  I could see in the 
light from a streetlight outside that Mary was rubbing her cunny.  I 
watched for a couple of minutes, then she began to rub real fast.  She 
arched her back and let out a low moan as she came.  My own dick 
was rock hard by this time.  I gently closed the door and eased back 
into my own room.  Pushing my pajamas down, I started to jack off, 
thinking about Mary and her bald pussy.  I knew that one day soon I 
would be able to get inside her and fuck a girl for real.  As the jism 
began to spurt from my cock, I thought I noticed the door to the 
bathroom close.  Mary had been peeking just like I had been!  I got 
some tissues and wiped the cum from my chest and stomach.   
	I continued to lay there, thinking about Mary.  After a little 
while I heard Mom and Dad come up the stairs to get ready for bed.  
The door to my room opened and Mom looked in.  I quickly shut my 
eyes and pretended to be asleep.  The door closed and I heard her look 
into Mary's room also.  I laid there for another fifteen or twenty 
minutes when I heard my Dad moan.  Since the baby had been born, 
they were leaving their bedroom door open so they could hear when he 
woke up.  I got up and went to my door, quietly opening it an inch or 
two.  I heard another low moan.  Very quietly, I opened the door and 
slid out into the hallway.  A dim light from the nightlight in David's 
room illuminated the hall.  The door to my parent's room was open 
about a foot.  I crawled down the hall until I could see into the room.  
   I almost gasped in shock when I looked in.  The light from their 
bathroom partially lit the room.  I could see Mom laying naked on the 
bed.  Dad was laying between her open legs licking at her pussy!  As 
he lifted his head from her crotch, I could see that Mom's pussy was 
covered with a thick mat of dark hair. Dad wrapped one arm around 
her leg, and using his hand opened up her pussy lips.  His head dipped 
back down and he began to flick at her with his tongue.  Mom was 
squirming around on the bed and trying to be quiet. Dad's other hand 
moved up her body and he began to massage her milk-swollen tits. 
"Careful," I heard mom say, "They're kinda sore from nursing."  Dad 
rolled her tit around with the palm of his hand.  Her nipples were hard 
and stuck out about and inch.  He slowly began to kiss his way up her 
body until he reached her swollen globes.  He took her right nipple 
into his mouth and began to suck!  I could see that his hand was now 
in Mom's lap.  He slowly inserted a finger into her pussy and began to 
pump it in and out.  This continued for a minute as Dad nursed at her 
breasts, first the right, then the left.
	Soon, Mom pushed Dad off of her and onto his back.  His 
hard-on was sticking straight up in the air.  Her hand went down and 
wrapped around it and she began to slowly stroke up and down the 
way Mary had done to me that afternoon.  She then bent her head 
down and took the end of his hard cock into her mouth!  My hand was 
stroking my own hard cock as she began to slowly bob her head up and 
down on his hard rod.  Her hand was still stroking the part of his 
enormous erection that she could not get into her mouth.  I could hear 
soft slurping sounds as she sucked on him.  Occasionally, she would 
take it out of her mouth and lick around the head like a lollipop.  Dad 
had one hand on the back of her head, and the other was twisting in 
the sheets, trying to be quiet.  After a couple more minutes of sucking, 
Dad lifted her head up.  Mom let his cock pop out of her mouth and it 
slapped back against his stomach.  She raised up and straddled him.  
Reaching between her legs, she pried back his cock and positioned it at 
the entrance to her hairy pussy.   
	As she slowly lowered herself onto him, my own cock began 
to spurt it's seed.  I quickly flipped it back into my pj's, hoping that 
none of it got onto the carpet.  As I looked back into their room, Mom 
began to move up and down on Dad's huge cock.  It must have been 
eight or nine inches long, much longer than my measly five inches.  
Dad was thrusting up into her.  At the same time he was massaging 
her huge breasts!  I thought I saw something squirt out of her tits into 
Dad's face.  His tongue was licking at his lips and cheeks.  After a 
couple of minutes, he pulled her down to him.  He then rolled over 
until she was underneath him.  He began to thrust himself deep into 
her wet pussy!  I couldn't believe I was seeing my own parents fucking.  
Mom began to moan a little louder and Dad's thrusting became 
quicker.  "I'm going to come!" Dad whispered loudly as he slammed 
into her harder.  Mom raised up to meet his thrusts, and pulled his 
head down to kiss him.  Even though they were trying to be quiet, 
moans escaped from them both as they reached their orgasm together.  
Dad collapsed on top of Mom, and they lay there kissing one another.   
   As I started to slip back to my room, I heard a squeal from David's 
room.  He was awake!  I turned and quickly crawled back to my room 
and closed the door.  I held the doorknob until I heard Mom go into 
his room to pick him up.  I gently eased the knob closed and quickly 
crawled back into bed.  My pajamas were wet and sticky from the cum 
I had exploded into them.  I grabbed some tissues and cleaned up 
myself as best I could.  However, I knew that mom would be able to 
see the cum stains on my shorts if she looked close enough.  I just 
prayed that she would be in a hurry and not notice them.  I could 
hardly wait to tell Mary what I had seen! 




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