Note: This story was dynamically reformatted for online reading convenience.
 
 Living close to the centre of the city, I sometimes find that I'm working
very close to home, and a recent assignment with a company located just
across the road from my apartment block led to this whole crazy episode.

   I was just an average guy returning from lunch and catching the elevator
back to the 23rd floor when the doors opened on the second level and one of
the most sensual girls I've ever seen stepped in.

   Not classically beautiful, but a look that turns me on, dark eyes,
slightly olive complexion, and wearing a thin summer dress which clung to
her petite body.  Perhaps one of those stunning Eurasian girls who combine
the best of the features of both our races.

   The bright sun in the atrium where the second level opens out shining
through the thin dress and outlining her legs to the crutch and I almost
imagined I could see her mound beneath the panties vaguely visible under
her dress.

   I was suddenly conscious of her sideways glance - quick, almost
enigmatic, but lasting a fraction of a second too long to be mere accident.
And an almost electric spark that was so quick that I must have imagined
it!

   About a week later, I had to work back a little later than normal and
left a little after 7.30 pm.  Our offices are on the 23rd floor, and with
only one elevator operating, it took about three minutes to arrive.

   It stopped at the second level and in she stepped!

   The same glance and spark, but I could see she was a little agitated. 
As we stepped out at ground level, I made a remark about how slow the
elevators were.  We walked out together and she passed some comment about
them ruining her evening because she now had 55 minutes before her next
train.

   Given the station is about four blocks past my apartment, I made a
comment about how I could be home in bed before she even reached the
station.  Then as a casual, but not too subtle throw away line, I said
"better still, we could both be home in bed".

   She gave a quiet little laugh, but said nothing as we headed off, me to
my apartment and her to the station.

   We were almost at the doors of my apartment block by now, and she
glanced at her watch and said something about 52 minutes to kill.

   The doors of the building slid open and I turned my head to wish her
well and say I hoped she got home safely.  To my shock, she was right
behind me and following me inside

   We went into the elevator and started to nervously key the pass number
for the security pad.  I'd just finished and pressed the button for the
fifth floor when I heard the softest and most sensual sound in the world
... the long sweet sound of a zipper being slowed drawn.

   I almost froze without turning and then saw the thin, white summer dress
slip to the floor and her standing in thin, satin knickers, a tiny bra with
her small, dark nipples already erect through the sheer fabric.  And a pair
of silky stockings with thin pink garters.

   When the doors opened at the fifth level, I grabbed the dress and made
it to my door double quick in case the cantankerous old couple next door
were on the prowl.

   Although I was shaking like a leaf, it was go-for-broke time, and
without a word I led her to the bedroom.  She sat on the edge of the bed
smiling the same slight, enigmatic smile she gave me when I first saw.  I
stripped as fast as possible, and felt a little embarrassed by the wet spot
my pre-cum had left on my underpants.

   I reached behind her to unclip her brassiere.  She gently pushed me
away, and standing, slipped off her sheer stockings, and bet slightly to
tie the end of one to the post at the head of the bed.  She tied the other
end into a loose loop and slipped in over her left wrist.

   Handing me the other stocking, she nodded at the other bedpost and
before I could reach it, she was already on the bed, legs slightly apart,
and with her right arm extended so I could loop the stocking around her
right wrist.

   "Twenty minutes each" she murmured, indicating the alarm clock on the
bedside table which I set with still-trembling hands.  It was a hot day and
I switched on the table fan to allow a deliciously cool breeze to sweep
across her partially naked body

   By now, the pre-cum leaking from the tip of my prick warned that I'd be
shooting my load pretty quickly if we got into anything fast and furious
right away, so I decided to use up most of my 20 minutes teasing her and
arousing her before I finally rammed into her.

   I was so horny at that stage that I couldn't have cared much about "her"
twenty minutes ...  I would have "cum and gone" as the expression goes! 
One look at her small, erect nipples nearly brought me off.  I pulled her
up off the bed, and finally unclipped her satin brassiere.  Now she was
tied, I couldn't rip it clear, so I had to lift it, and push it up under
her chin.

   I positioned my shaft over her right breast and gently squeezed the
pre-cum out over her.  My finger slowly spread it around her ever erect
nipple, teasing it to new heights.  I lowered my mouth over her and went to
work licking and sucking it off again.

   I must have spent about ten minutes nibbling, sucking and massaging her
neck, breasts, nipples and softly stroking the insides of her slightly
parted thighs until she was very aroused, very wet and struggling to reach
inside her panties.

   But she couldn't quite get there because the stocking bonds only allowed
her to stretch to the thin elastic about three inches above her pulsing
mound.  She looked at me almost asking, almost pleading for me to help. 
And I wasn't quite ready to help her to the waves of electric relief her
first orgasm would bring!

   Lying on the bedside table next to the fan was a pair of steel scissors.
I leant over and picked them up and started to tease her hard nipples with
the icy steel for a few moments.  She was gently moaning by now and I
decided it was to time to help bring her to the massive release I knew was
building inside her.

   I slowly slide the blade down the under the thin strap on the right side
of her knickers.  They looked brand new and expensive and I had a quick
pang of guilt about ruining them, but I thought, hell, she's the one who
initiated this and it's a small price to pay.

   With a quick movement, I cut the strap through.  I lifted the now
loosened section and placed it over her mound so I could just see the edge
of her glistening, black, pubic thatch, then slid the flat of the scissors
across her lower belly just above the now partially free elastic, down the
left side and cut through there, placing that side across her mound as
well.

   Starting at the ankles, I gently and slowly slide my hand up the inside
of her legs until the back of my fingers were lightly brushing the wet
cloth lying free and waiting to expose her swollen sex.

   I slipped my hand underneath her lovely rump and gently tuged the
panties off from behind and upwards, making sure that they pulled slowly
through her dripping wet pussy and crack of her perspiring cheeks.  The
thin cloth was soaked through and I started to suck the sweet moisture from
them and for a second I thought about pushing them into her mouth so she
can taste her own secretions.

   I moved her knees further apart so I could drink from the wet fount
between her legs.  I saw the look of anticipation on her face as I slid my
hands slowly up her thighs pushing them further apart as I lowered my mouth
...

   To my horror, the alarm sounded!