                  A brother's duty to his sister
                         An Erotic Story

     I woke up to the feel of a familiar body sliding into bed 
with me.  "Hi Mark," I said, as the sexy feel of my son's naked 
skin next to mine both woke me up, and warmed me up at the same 
time.  "What do you want, this time of morning?"
     This produced a giggle from me, and a chuckle from Mark.  We 
both knew what my horny son wanted from his mother.
     "I don't know," joked Mark.  "It's just that something 'big 
came up' and I was hoping that you 'might help me out' by 
'getting things straight between us'."  I KNEW I should never 
have taught him those puns!
     "Did you fuck both your sisters yet?" I asked.  I knew that 
sometimes Mark liked to fuck me so much (since he knows I'm 
fertile and trying to get pregnant) that sometimes he neglects 
his other duties.
     "Just Karen," he responded.  I was about to chastise my son, 
and send him back to 'take care of' his little sister first; when 
he continued, "Dad was already fucking Sherry when I left; so I 
wasn't worried about her."
     "Oh," I said; snuggling back to the boy; so I could fit his 
still-slippery prick up against my own slippery hole.  "Well, 
don't forget to fuck her too.  Sherry may not be old enough to 
get pregnant like your big sister; but she still likes to feel 
what it's like.  Even though your father is fucking her, I STILL 
expect you to, too.  OK?"
     "Yes Mother," sighed Mark.  I knew my son didn't really NEED 
reminding to fuck both his sisters.  Still, little girls needed 
lots of thick family seed squirting in their tight little 
tummies, if they were going to get pregnant as early as possible.  
Even 7-year-olds needed the practice.  So, even though my husband 
was probably filling the child's womb with his incestuous cum, 
even as my son filled my vagina with his incredibly sexy cum-
dribbling cock, I still wanted the boy to squirt HIS sperm in the 
little girl at least once a day; so she would develop as fast as 
possible.  Each time the child got another boy (or man) to cum 
inside her, drew her that much closer to the time when her body 
would be ready to accept her father or brother's seed, and 
produce a child of her own.
     My mind went blank at the sexy thought; and I started 
clamping and squeezing on my son's prick in a manner that few men 
can resist.  Only Mark had already spent himself once in his big 
sister; so he managed to retain control and keep on fucking me 
right through three massive orgasms, before finally jamming his 
thick prick to the root in my belly and letting me feel three, 
then four thick squirts of my son's precious sperm squirting 
hotly into my receptive womb.
     By getting the second orgasm from Mark, I knew I was 
actually more likely to get pregnant than if I got the first.  
such a sexy thought.






                                1


     I was just coming down from my high; enjoying the sweet 
pleasure of feeling my own son's potent seed still leaking out of 
his prick and up inside my womb, where it might be getting me 
pregnant, so my son could be fathering his own sister on me, that 
I became aware of the whole family watching us.  I made a great 
show of stripping my son's prick with my cunt; reminding him of 
the chance that he might be making his own sister in his mother, 
just to turn-on the rest of the family. . . As if any of us 
NEEDED turning on.  <Giggle.>
     "Now don't forget to fuck your little sister," I reminded my 
son; sliding my horny hole off his still half-hard prick.  The 
white streaks and obscene white glob on the end just emphasized 
the sexy obscenity of a boy fucking his own mother; just like the 
white drool down Sherry's leg emphasized the sexy obscenity of a 
7-year-old little girl fucking her own father; taking his thick 
white sperm right up inside her developing young womb, where it 
belonged.  "Remember," I said, "Sherry needs to feel her 
brother's sperm squirting in her cute little tummy, just like me 
or your big sister do.  Don't expect your father to do all the 
work."
     "YES mother," sighed Mark.  Still, I knew it would NOT be an 
onerous chore for the oversexed boy.  Even after inseminating 
both me and his big sister, My son's prick was still half-hard at 
the prospect of doing the same thing with the little 7-year-old.  
No, I wasn't really worried that my son would neglect his duties 
to either of his sisters.































                                2
