I got up on Katie's 16th birthday to find a note from Mum, telling me that she was tking the girls to school, a little early as she had a doctors appointment. I had some toast and a coffee, then got ready for work. I left the house just before 9, and went to my office to collect some doccuments.

My day was really boring, all I could think about was what Katie and I had done last night, and hoped that we would get to have a repeat performance soon. By lunch time, I'd had enough, and offerred to take the 2 guys out for lunch, which they were happy to accept. I took my car home, they followed, then we went to a local pub, where we went fairly regularly. The food was varied, and you could always get a great pint. At about 3, I told them I was going home, they offerred to split a taxi with me, but I told them I would walk, to try to clear my head a bit.

I got back about 3.30. Mum was in the kitchen, and the girls were not home from school yet. I told her I had some work to finish, but should be finished by the time that they all would be eating. I went to the office and sat down, I knew that I had a couple of pints too many at lunch, and fell asleep at my desk.

I was woken when I could hear laughter and splashing. I looked at my watch, it was almost 5.30. I realised that Katie's friends must have arrived. I slipped out the side door of my office, and headed for the back door. (I was not in the right frame of mind to see Katie). Mum was in the kitchen, she told me that Katie's friends had arrived, and that they seemed a nice group. She told me that there were 3 guys and 11 or 12 girls, all about Katie's age. She suggested that I go to see them, but I told her I was going up for a shower and to get changed. Mum told me that they would be eating in an hour or so.

I went to my room, got out of my suit, then got into the shower, (It was still light enough at night that I did not have to put on my bedroom light). I got out of the shower feeling a lot better, and started to dry myself. As I did so, I walked towards my window. Katie and her friends were all splashing around in the pool. Candi was sitting in the spa bath with some guy, who seemed to be annoying her. The overhead lights at the pool were on allowing me to stand at the window watching them all, knowing that they could not see me.

Katie was dressed in her favorite bikini, the top was too small, as were the panties, but they covered her, well just about. All of her friends looked about the same age, a few looked older, a few younger, but most about the same age. The boys looked a little older, but not by much. All of the girls were wearing bikini's, they were all different sizes, but not by much. Some had bigger boobs, some smaller, but they all looked very similar. The boys were wearing swimming shorts, apart from the guy with Candi, he was wearing speedo type trunks. I decided not to go to see them just now, I would wait until they came in to eat, when they would be wearing more. I knew if I went down to the pool just now I would probably get hard.

I heard Mum call them in, and they all got out of the pool and went into the kitchen. Mum called me, I finished dressing then went down to join them. I was wearing a short sleeved shirt and loose fitting trousers. I went down to the kitchen, they were all sitting there eating pizza's that mum had made earlier, they were still only wearing their bikini's. Katie introduced me to them all, a few of the girls were very pretty, the rest were average, the range in body shapes was bigger than I had thought when I had seen them from my window. There were a few girls who had boobs a lot bigger than Katie. A couple of the girls asked me to sit with them, I had hoped to sit next to Katie, but I went and sat with them, they were almost opposite Katie. I could see that the girls on either of me had hard nipples. Katie also noticed this snd kicked me under the table, I just winked at her, she knew what I meant by that, (that hopefully we would sleep together when they had left).

We finished eating, I poured some wine for Mum and Candi, and got a beer for myself. "Speedo Boy", asked wher his drink was, I told him if he showed me proof he was 18 he could have one. He got a little stroppy, saying he had been drinking for years. Mum asked why he had come to a 16th party. He told us he thought it would be a cheap way to get drunk. Mum suggested he and his friends leave. It turned out he and one of the other boys were only there as their sister had been invited. They dressed and left, shouting and swearing as they did so.

Katie wanted to go back to the pool, she asked me to join them, I told her I would do so if Mum and Candi did as well. Mum said she would, but she wanted us to sit in the spa pool. I went up to change, and managed to get into the spa before I became too obviously hard. Mum and Candi joined me minutes later. Mum came ouy with 3 bottles of Chanpagne, and about 15 glasses. Mum asked me to open the bottles which I finally managed to do sitting in the water. I poured full glasses for Mum, Candi and myself, and then poured half glasses for all the girls, and the 1 guy who was with them. Mum called them over to get a glass each, then we sang Happy Birthday to Katie. When they had finished thie glass, Mum asked Katie to take the glasses and empty bottles back into the kitchen.

Mum turned to me and asked why I had opened the bottles sitting down. Candi said to her, its obvious he could not stand up, Mum asked why, Candy said that with all the beautiful girls running around in bikini's I had a big hard on. Candi reached over and released my cock from my shorts. It sprang out, and it was possible to see about 2" of it sticking out of the water, Mum turned up the water jets to cover this up, then started to stroke my cock under the water, while I looked at all the girls. Every so often Mum and Candi would take turns in slowly wanking me.

We finished our Champagne, then Candi asked if we favcied a beer, and went to the kitchen to get some for us all. We sat and drank beer until about 8.00, while the girls were in the pool. The one guy that was left was looking bored so Candi asked him if he would like to join the adults in the spa, he was in the water in seconds. Mum put my cock away just as he got in. He told us his name was Leo(Leonardo), Mum asked who his sister was and he pointed her out to her. Her name was Lexi(Alexandria), and she would be 16 in about 2 weeks. Lexi was anout the same build as Katie, but had blonde hair, halfway down her back, she was a little darker skinned, and was wearing a small black bikini, (I thought to myself, why had I not noticed her earlier).

By around 9.30, we had left the spa pool and gone into the lounge, whilst the girls played in the pool. Then the doorbell rang, it was a couple of the girls mothers there to take them home, so 6 of the girls got changed and left, asking if they could use the pool again, Mum said anytime so long as they phoned first. Katie and her friends got out of the pool and got dressed then joined us in the lounge. A short wile later, the bell rang again and another few girls left. By then it was only Mum, Candi, me, Katie, Lexi and Leo that were left. Mum asked how they were getting home, Leo said he had driven there, but felt to drunk to drive home, so asked if we could book them a taxi, and they would collect the car in the morning. Mum suggested that they stayed the night, and they could drive home in the morning. They agreed, but told us they would have to phone their Mum. Mum phoned and came back saying that it would be ok.

It was now almost 10.00. Mum asked if anyone would like a drink, she offerred Leo and Lexi a glass of wine, which they eventually agreed to. We sat and chatted and listened to music for a while. I had to go pee, on my way back Katie was waitink for me, she told me she had wanted to fuck me again, but could wait till the next night, then she kissed me, and pushed my hand up under her skirt, her pussy was soaking. We stopped kissing just as Lexi came out of the lounge to go to the toilet, had she seen us ??

I went back to the lounge, Mum decided that Leo could have Kelly's room for the night, and that Katie and Lexi could share the downstairs rooms, while Candi was in the room opposite me. We had another few drinks then Katie and Lexi said they were going to bed. Soon after, Mum said she was going to bed. That left Candi, Leo and I sitting there. Candi asked if Leo had a girlfriend, by now he was a little drunk, he told us he'd been with a few girls, but was still a virgin, he told us that he liked to wank himself while he thought about feeling another cock.

Candi took him upstairs and put him to bed. I got the tv off, and went to see if Katie had enjoyed her birthday. I opened her door and she half sat up, she put her finger to her lips, asking me to be quiet. I said nothing, and went over to her bed to kiss her goodnight. She sat up, in the half light I could see she was naked. AS I leaned to kiss her, and feel her lovely boobs I thought I saw something move. Katie then pulled back her cover, Lexi was lying behind her, also naked, she had lovely little boobs, and I loved the way her hair partially covered them.

Katie whispered for me to get into the bed with them, and she was undoing my trousers at the same time. I took off my sshirt, as she took off my pants. I heard Lexi gasp as she saw my cock, then I got into bed between them, it felt great having 2 young naked bodies next to me...