The day started like any other, I was in class during the last period
of the day.  It was english, and Ms. Potter, my english teacher, was
droning on and on.  I had just turned 18, and would rather be at a
bar than in school, and told my friend as we both laughed.

"Michael, what are you laughing at?" the teacher said, giving me a
stern look.

"nothing" i replied. 

"Well, if something is so funny you can stay after class and clean
the boards." she told me.  I rolled my eyes, I would be missing my
bus home if I stayed, but I had already suffered some troubles with
the teacher and couldn't afford to get kicked out of the class.

The rest of the period went by slowly, I didn't talk since I was
already in trouble.  The bell finally rang, and the other students
filtered out one by one.  It wasn't long before it was just Ms. Potter
and myself in the room.

It was a very hot day, the sun was shining in through the window
and heating the room up.  Ms. Potter took off her long sleeve shirt
and walked over to me in her tank top.  I had never noticed before,
but she had very prominent breasts, and they jiggles slightly as
she walked.  I'm sure she must be in her mid thirties, if not early
forties, but for some reason her swaying breasts made blood rush
to my groin.  She sat down, oblivious to my staring.  She was a
fairly attractive woman for her age, 5'8", not very skinny but
certainly not fat.  Her dark hair hung to her shoulders and her
arms were fit from what I could see.  She had big hips and a large
bust, but her stomach was not overly fat.  As she sat down
on the desk in front of me, facing me, I noticed her legs looked
very smooth and nice.  I tried to look up her skirt, but her legs
were closed and I didn't want her to notice my interest.

"Michael, why do you insist on talking in my class.  You know how
it bothers me and distracts the other students." she said softly.

"I know, Ms. Potter.  I'm sorry." I replied, trying to tear my eyes
away from her chest.

"Well, you can erase the chalk from the boards and go home, but
next time this happens I'll send you home and you won't be
welcome in this class again.  Well, what are you waiting for?  Go."

I stood up slowly, hoping my erection wouldn't be noticable under
my shorts, but from the gasp I heard as I walked by her I think
it may have been.  She didn't say anything, but the thought of her
watching my crotch as I erased the board did nothing if not make
me harder.

"Michael, do you need a drink of water you look kind of flustered."

She said.  I didn't know what to say, I felt a lump in my throat, a
lump of embarassment.  I slowly turned around and noticed that
she was eyeing my crotch.  My face turned red.

"My, Michael, for someone so immature emotionally, you seem to
have matured physically rather nicely."

I couldn't believe my own ears.

"Pardon me?" I muttered.

"Michael, I have some time right now, how do you feel about some
advanced sex education?" she purred.  I almost fainted.  I just
stood there like an idiot as she casually pulled her white tank top
over her head.  She had a white bra on, and her cleavage was very
bountiful and appealing.  Her breasts were heavy, but not very
saggy and I could see a few freckles scattered on them.  She took
off her glasses and stood up, unbottoning her skirt and sliding it
off.  There she stood, in her panties and bra, looking very sexy to
me, despite the fact she had at least 20 years on my age.

"That would be wonderful" I said.

She walked over to me and unbuttoned her bra, easing her melons
loose.  Those beautiful fleshy globes swung loosely as she shook
chest at me and I almost blew a hot load in my pants.  She sexily
swayed her hips back and forth as she took off her panties and
stood in front of me.  She touched my face with her hand, and
it felt like electricity.  I could barely contain my orgasm.  She
knelt in front of me and slowly unzipped my fly.  She reached in and
pulled my seven inches of uncircumsized penis out into the air. 
Her mouth evelopped my swollen head, and her tongue burrowed
beneath my foreskin, driving me virtually crazy.  I started to hump
her mouth unconciously and it wasn't long before I blew blast after
blast of hot semen down her throat.  She stood up and kissed me
blowing my own seed back into my mouth.  I almost choked, but
swallowed it and violently kissed her back, our tongues circling
ferociously.  Then she sat on the desk, spreading her legs.  Her
mound was hairy, and damp.  Her juices were pungent and I could
smell them as I lowered my head.  I began to lick her clitoris and her
hips rocked and rotated as she moaned huskily.  Her thighs
squeezed my head painfully as she was about to orgasm, but then
I withdrew and stood up.

I stroked my penis once or twice, and plunged it into her depths. 
She groaned with pleasure as I thrust in and out rapidly, bringing
her to orgasm.  As her vaginal walls squeezed my member tightly I
spewed a second load into her body, leaning forwards and biting her
big nipples as I came.  I pulled my cock out of her pussy and she
started to finger herself.  She leaned over and licked the remaining
cum off my cock and then rubbed her clit with one hand and jerked
me off with the other as she gave me a second blowjob.  I bucked
and blew a wad of cum down her throat for a third time as she
brought herself to orgasm.

We had just finished and I was laying my head on her large breasts
when the door opened.  It was Old Bill, the janitor.

"What in tarnation is going on here?"