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 Later that evening as the day was starting to cool off, Michael went back
into the house to make some dinner.  His parents were away for a week and
so it was just him and his Sister in the house together.  He asked his
sister what she fancied to eat, and in the end they both decided that they
couldn't be bothered cooking and would just order a Pizza.  After eating
Sarah went upstairs, phoned a friend and started her usual hour long chat.
Mike watched a bit of TV and then started to smell something burning so
went to investigate.  He finally tracked the smell down to his sister's
room, knocked on the door, received no answer, but then noticed that the
talking sound had come from the bathroom so assumed Sarah was on the phone
in there.  Worried that the fire was going to get out of control he went
into Sarah's room and quickly found the culprit in the form a cigarette
that had fallen out of her makeshift ashtray (a coke can) and started to
smolder on her duvet.

   He was shocked that his sister was still smoking after the other day's
spanking, but didn't have too much time to think about it before his sister
ran in.  'What the fuck are you doing in my room!' she shouted 'I smelt
something burning, and it was a good job too or else your whole room could
have gone up!' Sarah's heart sank, not only had her brother caught her
smoking, but there was undeniable evidence in the form of a huge burn hole
that without drastic action would let her mother know that she had smoked
again.  Exactly what her mother would do terrified her, however it wasn't
just the spanking that worried her.  She had an enormous crush on a boy
named Mathew in one of her classes, and knew that he was going to be going
to Jenny Smith's party next weekend.  She was finally going to make her
move, but also knew that Jenny Smith also like Mathew.  If she wasn't there
she would lose him for good!  Her mind went into overdrive.  She didn't
have any money to buy a new duvet!  How would she keep it secret and would
her brother tell her Mom?  Mike's mind was also going into overdrive. 
Sarah was going to get a spanking for sure!  He was already thinking that
just maybe his mother's threat of spanking her bare bottom in front of him
would be realized.  His cock twitched at the prospect and he found himself
immediately start to get aroused.  Sarah decided that she would throw
herself on her brother's good nature to try and get out of the situation.
'Mike, please please please lend me some money to get a new duvet, and
please don't tell Mom!' But Mike was thinking about the spanking too much
to give in.  Even if it was done in her own room he had decided to make an
audio tape to play back as he indulged in his unhealthy fantasies.  'Not a
chance!  Your going to get such a spanking when Mom comes back!' Sarah's
heart sank, but she wasn't about to give in 'Please Mike, I'll do anything,
it's really really important that Mom doesn't find out ..  I really mean
it, I'll do all of your chores for 2 months, anything!' Mike was not to be
persuaded however.  'No, you need a spanking just like last time ...  I'm
really disappointed with you, you know you shouldn't smoke' Sarah decided
to be honest with him.  'Actually it's not the spanking I'm worried about,
if Mom finds out I'll be grounded for sure and miss Jenny Smith's party! 
Please Mike, don't do this!'.  She was on the verge of tears by now, and
knew that this was her last chance.

   At this point a terrible idea entered Mike's head, he knew that what he
was going to suggest next was insane but couldn't help trying.  It was a
big gamble and he knew that if he hesitated he would never get the chance
again, He took a deep mental breath and then made his suggestion 'OK, I'll
spank you then' Sarah was shocked, this was not what she was expecting and
she knew that what Mike was suggesting was not something that a brother
should want to do to his sister.  The idea also sent an unwanted sexual
tingle through her, and she remembered masturbating the fateful night of
her last spanking, not understanding why she replayed the humiliation of
having her bare bottom smacked like a little girl over and over again as
she pleasured herself.  'You've got to be kidding! ..  your not Mom!  and
I'm not a child!' 'That's the only deal I'm going to give you, answer me
now or the deal goes away.  You get spanked by me just like mom would have
done, or you wait till Mom gets home, get spanked by her and grounded, the
choice is yours' Sarah was cornered and terrified, she had nowhere to go
'OK, I'll do it.  Let's just get it over and done with' Butterflies were
dancing in her stomach as Mike then told her to come down stairs with him
and draw the curtains.  One of many things that was worrying her was the
fact that Mike had said the spanking would be 'just like Mom did', surely
he didn't know that she'd taken her knickers down?  She actually had no
idea how Mike was going to do the spanking and the whole thing terrified
her.  It was at this point that she realized that she was only wearing a
pair of shorts and her one piece swimming costume.  She was trembling as
she decided to try to steer the situation into the least humiliating
scenario as possible, so she bent over the table and while still keeping
her shorts on said to Mike 'OK, just get it over with please, this is so
embarrassing!' Mike was not going to let her get away with this however 'I
said just like mom did, I'm not stupid, I know EXACTLY how you got spanked
last time' Sarah's heart sank, but she thought she'd bluff it.  'OK, I'll
bend over your knee then' as she walked over to the couch where Mike was
sitting.  'No, stop playing dumb or I swear the deals off.  I already know
how Mom spanked you, but I want you to tell me so that I we both know what
you're in for.' Sarah was trembling and on the verge of tears as she then
said to Mike in a hushed voice 'OK, mom spanked me over her knee on the ..
on the bare bottom' She couldn't look at Mike as the horrible realization
that she was going to be made to expose her bare bottom to him, and that
shortly his hand would be spanking it!  Then she remembered that she was
wearing a one piece swimming costume.  Surely he wouldn't expect her to
remove that!  she would be completely naked!  'OK, just let me go upstairs
and put my pajamas on and then for fuck's sake please get this over and
done with' 'No' said Mike, and Sarah knew that her worst fears were about
to come true, Mike wanted to spank her completely naked.  'You've got to be
kidding!  I can't take this off in front of my brother!  I'll be naked!  I
can't do it!.  Please PLEASE don't make me do this Michael!' 'Do it now or
the deals off' Her face was bright red as she turned to face away from her
brother and began to slide the shoulder straps of her costume down.  She
was actually incredibly body shy, and while she had let boys roam around
her body with their hands under her clothes no one had ever actually seen
her breasts, let alone her pussy!  Like most teenage girls she was worried
about what her body looked like.  She thought her breasts too small and her
bum too plump.  How can the first person to see her body be her brother! 
She was trembling and on the verge of tears, but for some reason the
combination of butterflies and the knowledge that she was stripping naked
for a spanking from of her brother started a familiar tingle of sexual
excitement.  She hated the way her body was reacting to the situation, but
just couldn't control it.  Mike watched as his sister slowly, carefully
removed her costume trying to reveal as little as possible.  She still had
her back to him so all he could see that he hadn't seen before was her bum,
but he drank in the site.  Once the swimming costume was off his sister
turned around.  She had one arm over her breasts, and the other covering
her pussy, however even so he could the outside of a light pink aureole
just escaping.  'Please Mike, just get this over with quickly!' 'Put your
hands by your sides' 'What! ...  Mike please, no!, you're my brother this
isn't right, you shouldn't see me naked' 'Do it, or the deals off' Sarah
had gone this far, she felt humiliated and on the verge of tears.  The
sheer horror of being made to strip naked in front of a boy, especially her
brother was just too much.  As a single tear ran down her bright red face
she gave in, dropped her arms to her side and exposed her entire naked form
to her brother.  She closed her eyes but even so thought that she could
feel his intense gaze drinking up the sight of her young breasts and pussy.
The thought only seemed to increase the throbbing of pleasure coming from
her sex.
   To be continued ....