We are a very ordinary family. Mum, Dad, my sister Lucy and I living in a very ordinary house in a very ordinary town. As children, we had led fairly sheltered lives.
I had just turned nineteen. Lucy, at eighteen, was just under a year younger. Mum and Dad had planned it that way so we would grow up together. It seemed to have worked out. Lucy and I had the usual brother and sister arguments, but overall we got on together pretty well.
In the past couple of years, in fact, we had really stopped arguing altogether. So Mum and Dad felt they were able to stay away overnight and leave us on our own. It had happened a few times without problem. Tonight they had gone to visit friends and would not be back until tomorrow afternoon.
As was usual on these occasions, Lucy and I had ordered a pizza to be delivered. We sat and watched a couple of movies while I helped myself to one of Dad's beers from the fridge. As I finished it, Lucy decided that tonight she wanted a beer. So I went and fetched two more and flipped the tops with the bottle opener.
We finished the beers and each made our way to our room. I switched on the computer and played games for an hour or so. Then I undressed and pulled on my pyjama trousers and got into bed.
Sleep would not come for some reason tonight. I got out of bed and made my way back downstairs to the lounge. I switched on the TV and turned the volume down low.
Flipping through the channels to find something to occupy my mind, I heard the door open. I turned as Lucy came into the room, also in her PJ's. She was wearing a pink set of shorts and tee-shirt top. She flopped down into the sofa beside me.
"I can't sleep, Tom," she said.
Having found nothing I wanted to watch, I threw her the remote. She went through the same exercise before pressing the power button, sending the screen to black.
Thinking for a moment, she suddenly sat up and turned to face me.
"Let's play a game," she said.
Thinking she meant a board game, I told her I really didn't feel like it.
"Oh please, Tom!" she almost implored.
With nothing else I could think of to do, I said OK and asked what she wanted to play.
"Truth or dare," she said with a big grin on her face. "I've played it with my friends sometimes when we're bored. It's fun."
Again I acquiesced without any real enthusiasm.
Lucy insisted on having the first go, so I opted for a dare. She made me try to touch my nose with my tongue, which I just about managed. We swapped a few rounds of fairly standard dares and truth questions. I was getting bored. So, thinking that it would bring the game to an end, the next time Lucy asked for a dare I jokingly said she should show me her boobs.
With barely a second's hesitation Lucy took hold of her PJ top, whipped it up over her head and off. Although she moved fast, to me it seemed to happen in slow motion. I saw the top rise up over her stomach as she raised her arms. Then I saw her pretty little tits being pulled up as she raised the bottom of her shirt and bounce down as the top came off completely. The effect was like the front of a luxury car settling on its suspension after sudden braking.
I was stunned. Of course I had seen Lucy in a swimsuit, but I had never seen her boobs before. In fact I hadn't really thought about them since they first started to appear about three years ago.
Now here they were, just a yard in front of me. I had to admit they were very nice - no, they were perfect! Not too large, but well-shaped and with the firmness of youth. The skin was milky white while the small nipples were perky and strawberry pink. I couldn't tear my eyes away from them.
To be honest, I was not very sexually experienced for a nineteen year old. There had been a couple of girlfriends and lots of kissing in the last year, but I had not got beyond a bit of fumbling under bras and brushing fingers across panties. This was as close as I had got to naked boobs and they were my sister's!
Lucy was loving the fact that she had me obviously flustered.
"Now your dare!" she said without actually offering me a choice. "You have to show me your dick."
I wasn't sure about this, but there was no way I would back down in front of my little sister, so I didn't think about it for long. I was only wearing my PJ trousers and did not want to get totally naked. So I pulled the elasticated waist of the trousers down over my prick and balls and sat there with my genitals on display.
I am more of a "grower" than a "shower". Despite the sudden appearance of a pair of pretty tits it had not started to react, so it probably did not look very impressive, but clearly Lucy was no connoisseur as yet and delighted in studying my manhood hanging over the front of my trousers. Meanwhile, I was still staring like an idiot at Lucy's nipples.
I was a little relieved when Lucy broke the spell and asked for a truth question next, as I was not sure where to take this situation. But my mind was clearly fixed on sex because I heard myself ask her to tell me about the naughtiest thing she had ever done.
She had an impish look on her face as she told me that the only sexual thing she had done was a little touching and masturbation with a friend. I demanded to know who he was. Lucy smiled coyly as she told me it wasn't a "he", but a "she". Ignoring the basic rules of Truth or Dare, I insisted she tell me more.
She told me it was with her school friend Sarah. The two of them had been in Sarah's bedroom late one afternoon last month. They had been talking about boys, as young girls do. They had also been using Sarah's computer to access some porn on the internet and talking about what the girls must feel when they were having sex.
Without warning Sarah, who is a little older and far more precocious than Lucy, lay back on the bed, pulled up her skirt and pushed a hand down the front of her panties. Parting her legs she started to stroke her pussy gently saying she wanted to imagine a boy making love to her.
After a minute or two she encouraged Lucy to join her on the bed with her and do the same. Lucy said she really didn't know why, but she did it. Before long their panties had been discarded and they were side by side, legs spread wide, frantically rubbing their fingers up and down their young slits. Lucy had played with herself before of course, but always in private. She said there was something really exciting about doing it in view of someone else, even if it was a girl.
Just as she was starting to get wet, Lucy said she felt Sarah grab her hand and replace it with her own. Lucy was enjoying herself far too much to object, so she let Sarah take over. Sarah's fingers slipped up and down her pussy, rubbing gently, parting her lips and finding her most sensitive bud. Lucy responded in kind, stretching out her hand to Sarah's pussy. She said Sarah's felt hairier and bigger than her own. She was able to curl two fingers under and push them into her hole, soon starting to work them in and out.
They carried on like that for some time with Sarah gently massaging Lucy and Lucy penetrating Sarah, frigging her to a climax. Lucy told me she did not reach a climax herself, but I was not so sure. I thought she just didn't want to admit that a girl had brought her to orgasm.
