Note: This story was dynamically reformatted for online reading convenience.
 
 Title: Don't Make a Mess on the Bed
Keywords: mFg, preg, inc, cons, ped

   Julia stepped on the doorway.  From the sounds that she could hear from
her son's bedroom, she already knew what was going on, but wanted to make
sure everything was going alright.  The bed was squeaking as the athletic
17-year-old son of her was fucking her 12-year-old little sister for all
she was worth.  Julia enjoyed the beautiful sight of her two kids rutting
each other, and walked in.

   "Robert, make sure you cum all the way inside your little sister.  I
don't want you to make a mess on the bed.", Julia told the boy.  He was
already straining to keep his cum in his balls, when he felt his mother's
warm hands on his butt, pushing him deeper into the girl.  Robert quickly
glanced over, then grunted "of course."

   Julia turned to her older daughter, still lovingly keeping her hand on
her son's butt, feeling it move in a pumping motion between his very own
sister's legs.  "Ginny", the mother addressed her, "When was your period?"

   Ginny was letting out small gasps, enjoying her brother's cock pounding
inside her.  She was focused on the sensations, and it took her a good
moment to answer her mother's question.  "Umm, I dunno, I think a little
over a week ago."

   Julia nodded.  "Alright, good." Her hand caressed along her son's back
as he kept fucking into his sister.  His breathing was getting heavier. 
Julia knew her son.  He was close.  "Come on, Robert, kiss your sister,
don't just dump your load inside her.  Make sure she is feeling loved while
you do it."

   Robert lowered himself and the kids had their lips met.  Ginny was
becoming quite a good kisser already, and seeing the two of them open-mouth
kissing so wildly was a heartwarming sight for Julia.  She remembered what
would happen next week and thought that it would be a good time to announce
it to the couple.  "Robert, after your dad pops Cheryl's cherry in her 10th
birthday party next week, I want you to start cumming all the way inside
her as well."

   Julia could see Robert liked the sound of that.  His hips did few
frantic thrusts, before lodging balls deep inside his sister's cunt, cock
head bruising against the young cervix - then all the sudden it pushed even
a bit deeper - Julia had recognized what was happening and did one final
shove to force Robert's cock as deep inside of his sister as possible.  His
warm cum started shooting into his sister's fertile womb, filling it all
those millions of incestous sperms that did their best to try to impregnate
her young body.  Ginny's arms and legs clenched around her brother, and she
squeezed him as much as she could.

   Their mother just enjoyed the sight.  Her 17-year-old son, whole body
jerking between the legs of her little sister, that was not yet showing any
curve, but whose body was already capable to breed.  Any mother would only
feel pride for having made such good kids that looked so beautiful
together. Inside Julia's mind, she was already imagining what the kids of
the two would look like.

   Robert's body stopped jerking and he laid his body on top of his sister.
Julia reached her hand to fondle her son's balls, the only thing that was
outside of Ginny.  "Mom, if you keep doing that you're going to make me
hard again", Robert murmured.

   Julia grinned.  "Maybe thats the point." Then she got more serious. 
"When you pull out, I'm going to take your cock in my mouth right away.  If
there's any dribbles of cum, we don't want them on the sheets."

   Robert nodded, and slid his wilting cock out.  Ginny already knew what
to do - she pulled her young legs up and held them, ass and hips pointed up
the air, to make sure that anything inside her leaked inwards, not
outwards. They had been well taught to not make a mess on the bed.  While
having his cock sucked by his mother, Robert still had the courtesy to help
his sister by grabbing couple of pillows for her to put underneath her
hips. To make it a little easier for her to stay there.  She knew it was
good to let her brother's cum soak in for a while.

   Julia enjoyed last few sucks of her son's limp cock.  It started to be
clean of cum.  She loved the taste of her son's cum, as any mother did. 
After all, every mother is meant to receive their son's cum.  Julia
lamented the fact that she wasn't able to bear any children any more, for
she would have loved to receive her son's cum where it belongs, but now it
would be a waste.  So her role was just to make sure that kids didn't make
a mess on the bed.  They needed to do it right.

   After a while, as Ginny got up off the bed and slipped panties on, it
was clear that there was no mess on the bed.  Julia looked at it and was
happy she has such smart and pretty kids.  Pretty they did look, for Ginny
and Robert were again kissing like lovers.  It was good to live in a calm
house as well, in a house where kids never fought each other, because they
all had been taught to love each other in the deepest ways possible.

   Julia couldn't wait until Ginny would catch, and even more so she
couldn't wait that her brother - the father of her children - would take
the cherry of their youngest.  The future seemed exciting for the whole
family.  Soon both of her beautiful daughters would carry children for her.
Hopefully more daughters, though of course they needed some males to fuck
them.

   She went to her bedroom to fantasize and masturbate.  A moment later
Robert entered the room, with his young cock again hard.  "Hi mom...  I
thought you needed some love too."

   What a sweet, thoughtful son, Julia thought.  "As long as you don't make
a mess on the bed", she smiled at her son, that mounted between her legs.
"Of course not", Robert grinned.

   No drop of cum soiled the bed sheets that day, and such accidents would
be rare even in the future.

   ***

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