I was going to post this as one piece, but it was getting a bit long, so I split it. This is the first half.
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It happened the summer after our nineteenth birthdays. I'm named Peter and I'm the youngest of a set of triplets, two girls and a boy. Pamela, my oldest sister and the quiet studious one, was born a little before 11 p.m. Pippa, my other sister and the excitable adventurous one, about half an hour later. I, being the ever tardy, laid-back one, didn't arrive until nearly 2 a.m. the next morning, giving me a different birthday to my female siblings. When we were children my sisters delighted in teasing me mercilessly. That slowed and then stopped after we reached puberty; I think they began to realise it wasn't a good idea for many reasons, the main one being that they recognised I wasn't the same as them anymore. We still got into trouble as a threesome fairly regularly, even the sensible Pamela. It usually started with some wild idea from Pippa; she would convince me it would be fine and then the two of us would rope Pammy in. Our parents had soon realised who the real troublemaker was and Pip was constantly being told off. She just shrugged and carried on. Pam seemed to take it personally and would keep away from me and Pip for a week or so, until we came up with some new plan to involve her. I always just let things happen, mainly to see what WOULD happen. I think my parents could tell I was weak-willed where my sisters were concerned and rarely blamed me for anything. I would offer myself up as the instigator when it looked like Pip or Pam were really going to be in trouble, but I don't think my Mom and Dad ever really thought any of us were particularly naughty.
I didn't date much throughout my school years; I think my two beautiful sisters put off a lot of prospective girlfriends. I was horribly aware of how striking my siblings looked and to be honest, not many other girls matched up to them. Pamela had to start wearing reading glasses when we were sixteen but that didn't make her look any less hot. And Pippa! Well Pip's thirst for adventure meant that she was always on the lookout for a new boyfriend or a new experience and she dressed accordingly. Any clothes on Pippa looked stunning. 'If only she wasn't my sister' I thought on many occasion about both of them.
The summer break after our nineteenth birthdays our parents announced they were going to be away for eight weeks on a long delayed and well-deserved holiday for just the two of them. Pam, Pip and I were delighted for them. We all knew they deserved a break and we were old enough to fend for ourselves now. On the day we waved them off at the airport we did what any 18 year olds would do: we went home and organised a party!
Between the three of us we knew a lot of people so it was a huge party. Although it wasn't due to start until 8 p.m. people began arriving earlier than that, some with extra 'supplies' (more beer!). Initially it was Pippa who meet them at the door, but after her boyfriend arrived I took over. Pamela had stationed herself at what we were using as a bar, the table on the patio, but was enticed away by Pip and didn't go back.
By 10 o'clock the food and alcohol were flowing and nobody new was arriving so I left my post at the door and went to get myself a serious drink. I looked out through the patio door as I poured it. Pam was walking up to where Pip was talking with her boyfriend Jamie at the bottom of the garden. The girls both had their backs to me and as I gulped down my first 'Jack Daniels' I took time for the first time in ages to really look at them. Although a little over thirty minutes separated their births their personalities were so different, but they looked so similar even now. If Pam wore sexier outfits, or Pip more sensible ones, no-one would be able to tell them apart; or nearly no-one. Dad had a bit of a problem knowing which daughter was in front of him: Mom less so, but sometimes even she got it wrong. I was the only one really able to tell them apart. As I looked, or stared, at them my eyes began to roam over both of their curves. I took in how much tighter Pam's bottom looked, which probably meant Pip was wearing a thong under her short skirt; I took in the fact that Pip's legs looked so much more sexy than Pam's, due to her wearing heels rather than Pammy's sensible sandals. I shook my head. I shouldn't be thinking like this about my sisters. As I went to turn away Jamie pushed angrily past the girls and stormed up the garden towards me. As he went by me he gave me a grim smile and muttered 'good luck' under his breath before heading for the front door, slamming it behind him.
I went down to Pam and Pip.
"What's up with him?" I asked, nodding in the direction Jamie had taken.
"Didn't like playing second fiddle." Pip said shrugging.
I looked quizzically at Pam.
"I didn't hear the argument." She said, shrugging.
"Sod him." Pippa said with one of her wicked grins spreading over her face. "Pam and I are going to have a lot to drink tonight little brother. That puts you in charge of the rest of the party." With that she took Pam's hand and towed her towards the alcohol. I let them go. If they were going to drink together that meant I may be able to get some flirting done without them interfering.
By midnight all the booze had been drunk and everybody began to wend their way home. Pam and Pippa looked the worse for wear, so I sent them to bed and began to tidy up the worst of the mess we'd made. I dumped all the bottles and cans into the recycling bins, put all the glasses and plates ready to be washed in the morning and swept up one or two bits of broken glass and crockery. I looked at my watch and was shocked to see it was nearly 1 a.m. The rest could wait until tomorrow. I made my way up to my room and went in without turning on the light.
With a tired sigh I took off my jeans and tee-shirt in the darkness of my room, dropping them onto a convenient chair and moved towards the foot of my bed. From the direction of the head a female voice came out of the gloom.
"It's about time you came up."
"Who's there?" I said, slightly startled. Was it one of the girls I'd been flirting with at the party? As if in answer the voice came again.
"It's me Petey." It was a quiet voice, a voice I knew so well.
"Pippa?" I could now make out her face in the shadows, framed by the pillows and the sheet she was holding up to her chin. "What are you doing here?" I asked.
"Waiting for you silly."
"All right," I sighed. "Why are you waiting for me?"
"Because I'm feeling adventurous. How about you?" She reached over and switched on the bedside lamp, letting the sheet drop down to her waist to reveal her naked upper body. I stared at her perfect c-cup breasts, my dick hardening at the sight. I willed it to stay down to no avail. "Like them?" She asked, noticing the direction of my gaze.
"Ummm, they're very....nice. Don't you think you should cover them up?"
She smirked.
"Your mouth says that, but your body...." She refocused her eyes on my boxers, where my disobedient cock was straining to be released.
"Pippa, no! We can't!!" I whispered hoarsely, suddenly realising what she meant by 'adventurous'. Still smiling Pip threw the sheet back and crawled down the bed on all fours, a wicked smirk on her face. I could now see that she was completely nude, even catching a glimpse of the tuft of hair where her legs met. My treacherous cock twitched again, Pippa knelt at the end of the bed, her breath on my chest. She looked up at me, devilment shining in her eyes.
"What...? What are you thinking of doing?" I managed to gulp.
Without answering me, my gloriously sexy sister tugged my boxers down to my thighs, releasing my raging hard-on to her gaze.
"Ooooh!" She said in feigned surprise. "I can't call you 'little' brother anymore can I?" She added mischievously.
"Pip, Pippa. Stop. You shouldn't...."
"But I am. And you want me to do it as well, don't you?"