Author's note: This story is a take on a theme by beatingoffbob. and meets with his approval. My thanks to him.
Chapter 1.
I called Chelsea at home, from my office, to remind her to be ready for the party that night. She told me breathlessly she'd be ready to go, but that I couldn't see her until we were actually ready to leave, please!
That intrigued me no end, and I looked forward to taking my lovely eighteen year-old niece to her first real social affair, a thing the company was putting on for our clients.
My mind ran back to when she had come to stay with me almost six months ago now, while her parents were over in London. Chelsea had insisted on her mom going with her dad, a year of separation was not good she said!
And Chelsea would get to stay with her favourite 'Uncle Pete', fun to be with, and at least thrice-removed, and not a real pain in the butt like most of the family. I had a house-keeper, and Chelsea's parents knew she would be well looked after.
She had stayed with us often, when I was married, and she was a little punker, before my wife died in an airplane accident two years ago. Right now though, the house-keeper was away for a month, on her annual vacation, and Chelsea was lording it over everything, completely in her element as she played house with me!
I got home at six, took a shower, and shaved again... I hate that, twice in one day... and leisurely dressed up in my tux and stuff. All I had heard from Chelsea were squeals of protest, as I tried to see her to talk to, so I retired to the study, and had a stiff brandy.
Soon, seven-thirty rolled around, and the company Jaguar sighed up to the door, and Paul the chauffeur, rang the bell.
"Be right down!" Chelsea yelled.
I went to the lobby, opened the door and told Paul we would be right out. I left the door open, and stood looking up the winding stairway, anticipating a grand descent now, after all this build-up.
Since this affair was going to be Chelsea's first foray into my social world, I had earlier asked my secretary, Wendy, to make herself available for Chelsea, if she so wanted. Chelsea had snapped at that bait like a striking salmon, and the two of them had been deep in girly things for the last three weeks.
Before I had left the office that night, Wendy had popped her head in my door, and said very mysteriously that I was due for a big surprise! I was thinking about all this, when finally I heard Chelsea come out of her room, and I looked up, and I knew right away that I was in deep trouble!
She was absolutely gorgeous, she looked to be about twenty-two, instead of the eighteen that I knew she was. Her lovely dress fitted her like a glove, her young body was a poem to pure sensuality, and when she had finally made her regal way to the bottom of the stairs, she twirled happily around for me.
It was only then, that I saw that the back of her dress plunged down almost to the crack of her ass, and her nicely sun-tanned skin was wonderfully bare. It was one of those outfits, that made a healthy, normally horny man like myself, hope that the dress might just fall off at any minute!
Then I saw the waist-band of her panties, just visible at the bottom of her exposed back.
"How do I look?" she said, blushing like a little girl, her eyes dancing, as she saw my obvious admiration.
I looked into her eyes, and said with feeling: "Darling, you will be the most beautiful woman at the party tonight... but there is just one small thing though...." I said smiling.
She blushed happily and twirled around again, and the dress settled down just a tad more, and her panties showed a tad more.
"Oh... and what is that, Uncle Pete?" she said, sticking her tongue out at me cheekily.
"Um... honey, you know that the dress is a little low in the back..." I said seriously.
"It's supposed to be, silly!" she answered, smiling pityingly at me.. men!
"Maybe... but I sure like those black lace panties you're wearing!" I said mildly.
She looked at me, her mouth sweetly open, then she blushed furiously as she realised what I was getting at, and she ran into the ground floor bathroom, saying she would be right back!
Paul was standing by the car, waiting patiently, and I said to give Chelsea another minute or two please. He smiled at me, he understood perfectly... he had two daughters of his own, a little younger than Chelsea.
We talked in a desultory way, then five minutes later, Chelsea rejoined me, all flushed, but smiling happily. Paul immediately opened the car door, waiting for us.
She turned her back to me: "Better now?" she asked, her eyes dancing, as I picked up her shawl, it was a warm night out, she wouldn't need a coatt.
I looked at her, no more waist-band, but I could now see the distinctive beginning of the crack in her ass! And that damned cock of mine immediately showed it's obvious appreciation, as I got an instant hard-on!
I put her shawl around her shoulders, and she turned around and spotted my condition right away. She covered her smile with one tiny hand, and looked down at me obviously, then back up at me.
"I guess your dress just passed it's first test!" I said a little uncomfortably, as I adjusted myself, at a loss for words.
She just giggled happily, and as I closed the front door, gurgled: "Is it going to be like that all night, Uncle Pete?" and she laughed deliciously.
I fell into her mood, and answered feelingly: "That's going to be up to you, honey!" and she giggled again, as I handed her into the car.
I was okay again by the time we got to the party, but I didn't miss her sidelong glance down at me as we walked in together, and I stuck my tongue out at her as she giggled once more.
Chapter 2.
That night, Chelsea came into her own, blossoming like a flower. It was a great party anyway, the best we had ever thrown. I told her to enjoy herself, it was her night, and to just save herself for me for the last half hour of dancing. I had to do my thing, and circulate.
Then Wendy had swept her into her arms, and carried her off to be the belle of the ball. I had told Wendy to try and keep Chelsea's relationship to me quiet, so that people wouldn't be scared off, and soon she was surrounded by every young single man there, vying for her favours.
