Lusted after a youngster -who is my wife's baby sister!

Before we married my wife took me to a birthday party for her sister. (turns out she has two sisters~!)
I didn't know a soul at the party, so just got a drink and found a nice easy chair to sit in - stay out of the way, chat if anyone approached me.
Well into the evening this young blonde took a seat on the couch across from me.
She was cute - nice body - but the best part was her short skirt!
As she sat there, moving and turning to talk to people who were beside and behind her....her creamy legs opened a little....then a little more!
Pretty soon I was sitting there in the shadows enjoying a very nice look at the crotch of her white panties! As she squirmed about, with drink in hand - getting rather careless with her legs - she did not seem to notice me for a very long time.
Well, even 15 mins enjoying the sight up a young girl's creamy thighs and the white crotch covering her sweet little soft pussy - can seem "like a very long time"! I was getting plenty of mental pictures to masturbate to, later. Man she was sexy!
Geez - I just wanted to go over to her, drop to my knees...push up her skirt and eat the crotch of those panties after licking my way up the thighs of this young thing!
I dropped my hand to my crotch and squeezed my dick....imagining it was being squeezed by the tight little pussy of that "young thing" sitting over there!
Finally - I glanced up from her cunt to see that she was looking at me. She was frowning like she'd caught some pervert animal of a guy. She snapped her legs together so fast she spilled her drink! Got up and went into another room.
Fortunately we didn't see each other after this!
My girlfriend (wife, soon) was driving us home. I was chuckling when my girl asked if I'd had a good time. Did you meet anybody - have a good chat?
She said, what is so funny.
I carefully at first, then getting more descriptive (because she says, guys will be guys - and it's no big deal) told her all about how I enjoyed this young blonde's short skirt...and "white panties". The very best part of my evening, if that doesn't upset you?
I noticed that the car was slowing - then she pulled to the curb.
"Describe this young blonde."
I did.
"Shortish dark blue skirt?"
Yeah.
"So, this cutie was turning you on?"
Yep - had a nice boner going there for awhile staring at the her crotch! - are you jealous?
"So, you were thinking, what? What would you have liked to do with this girl, if you had the chance?"
I noticed she was breathing funny...a little like trying to catch her breath! 'Oh, IDK, start out by chewing on those panties. Suck her little clit into my mouth. Flip her over and butt-fuck her little anus with my tongue!....and some other stuff."
"Like?"
'Her mouth was bothering me! I would have loved to put my fingers in her blonde hair and make her take me in her mouth. Then I'd face-fuck her and hold her -keeping my cock in her mouth until I came. Make her drink me!'
She pulled away from the curb and drove us to her apt.
She practically raped me when we got inside. she actually tore the top 2 buttons off of my dress shirt getting me undressed. I took the hint and got rough with her, too! Shoved her to the carpet, raised her skirt, yanked her panty hose and panties down none too gently....entered her and started pounding her. We are "slapping" out groins against each other.
Later, I was in the middle of my large orgasm and was grunting into her ear and spewing into her cunt....while she was snarling her way towards her own orgasm......

....and then I clearly heard her say, "that "LITTLE CUNT" at the party...... is..... my..... baby .....sister! ....You bastard!"

And then she bit the hell out of my neck and came!!

Well, that kid was still a few years from 18 - but how was I to know!
True story. We still laugh about it some nights. Well, I do. Wifey seems to have some lingering .....something.... about the whole situation.
I am smart enough to know that my lusting hard, unknowingly, after her baby sister, turned her on so much that it embarrasses her!