Daddy's Knee

Being such an active and horny girl growing up, getting caught was pretty much an
inevitability. A when, not if.  It didn't help that I would sometimes deliberately masturbate with the chance of getting
caught, such as with the door open or in the living room after school when I
knew I had maybe half an hour before my sister or one of my parents got home. I
would play and edge, and then when I heard the door downstairs open I would go
for it, not knowing they would be going into the kitchen first or coming
straight upstairs, so I would time my orgasm to the last possible moment I
thought I could get away with. Any they were amazing! That vulnerable, exposed
feeling and the risk of being caught would just set me off like nothing else.

I was never caught outright, though I had more than a few close calls and odd looks!

It's not like they didn't know I masturbated. My mum has caught me a whole bunch of
times with my hands down my jammies or humping a pillow in my room. She always
had the worst timing and a habit of not knocking. Looking back now I'm
pretty sure she knew exactly what I was up to in my room before waiting for just right right moment to walk in;
she just got a thrill out of busting and embarrassing me!

My dad was much better with knocking, being the only male in a house full of girls, but
he knew what me and my sister would get up to when no one was looking. 

One time I was sitting on dad's leg as we were doing something on the computer. I
was doing an assignment for school and he was teaching me how to format and
make it look neat and formal, since I wasn't in primary (middle) school
anymore. 

I wasn't particularly horny at the time, but sitting straddling Dad's leg was rather "pleasant" in an unintended kind of way. I wasn’t really paying it much attention or doing anything about it. After a while, however, I could feel my
lips starting to tingle and my clit begin perk up under my tights. Only mildly
awkward... I remember thinking how glad I wasn't a boy or it would be totally obvious!

I tried to put it out of my mind and concentrate on the First Fleet, but every small
movement of his leg and shift in my body as we leant from keyboard to book and
back were sending strong signals form my pussy and clit straight to my brain and right back down again. 

Despite my best efforts my focus vanished and my brain scattered and I was
struggling just to maintain a straight face and level voice as I kept up the
conversation with Dad as we worked on tweaking paragraphs and margins and
moving pictures around. The angle of his leg meant I was sliding forward
slightly, pulling the soft seam of my tights harder against my clit.

Severaldistracting minutes later and I started to feel that initial shimmer of a budding orgasm deep inside me and I knew I was in trouble!

I froze, concentrating on holding as still as I could, trying to keep my breathing and voice level
and focussing on holding back that rising pressure. In frazzled my state, I
gripped my thighs tighter around my dad’s leg to try and hold myself still,
but that completely backfired as I felt the building pleasure between my legs intensify
sharply and I gasped involuntarily and held my breath and hold back the
impending orgasm, but my orgasm began to gather momentum and build up, and I
wasn't even moving, just my weight on my vag and my tights pulled taught over my clit. 

I began to panic and in that state
I thought if I simply got up it would be totally obvious to my dad what was going
on, so I held still and tried to hold it back, but
it continued to build and build and but after a minute or two the inevitable happened and
I just came, with a gasp and a squeak and a shuddering grunt, my body then just taking over and grinding my clit against my dad's leg for three or four spasms before settling.

It was one of those orgasms that felt like it would burst out of my stomach. Trying to
hold it back only allowed it build up to a whole other level. I sat
there motionless, trying to ignore the last of the little spasms and twitches
of pleasure as they ebbed away, super conscious that I had just had an orgasm on my
dad’s knee! I could only sit there staring at the screen, pretending nothing
had happened and it was a very awkward silence for some time before either of
us could speak again.

Did he not notice? Surely… he never said anything or let on (nor to this day) but he can't
not have.

I didn't want to get off him and leave because that would have just confirmed my guilt,
so I just sat there straddling his leg, still getting little twitches and
shudders on the inside, prolonging and drawing out my orgasm. I was convinced if I got
up there would be a damp spot so I just sat there pretending I cared who
Captain Cook was as we awkwardly carried on for a few more minutes.

In the end, I had to get up because I could feel another orgasm starting to build up again as my accidental oragsm was still fading away! So I stood up quickly, mumbling something about needing to pee and went and hid
in my room for the rest of the evening until Mum came up and got me for dinner.