Things changed in the summer I was 18. My sister (Karen) is two years older than me and we were left to ourselves for the whole holidays. We had always fought a little but generally got on very well. My sister has a fabulous body but her friend (Laura) has a perfect body. Laura always belittled me and as she dominated Karen, Karen did not do much to protect me. To me Laura was unapproachable in a completely different league to me.
On the first day of the holidays Laura was at our house with Karen. They were spending time by our pool and as my friends were not around I was hanging around them. They were ignoring me as if I didn't exist but I was trying my best to hear their conversation as it regularly involved boys and sex. Ignoring me completely Laura slipped her bikini top off and challenged Karen to do so. Karen said she felt uncomfortable being topless with her little brother around.
"Don't worry about Matt you can get him to do anything you wish. My little brother does anything I ask him to. I little reward every now and again guarantees he is always very keen to help."
It was as if I was not there but I was and I was very interested in what the rewards might be. Fortunately so was my big sister. She questioned Laura about the rewards but didn't get any clear answers initially. Laura asked Karen to rub suntan lotion onto her so that she did not burn. Karen seemed keen to help her friend and applied cream to every bit of her body not covered by her bikini bottoms.
My eyes were popping out of my head and my prick was trying to pop out of my shorts. When Karen applied cream to Laura's large and very firm boobs I thought I might cum in my pants. Looking back Laura was clearly teasing both of us. She even told Karen to rub it well into her nipples that by then were much bigger and nearly black. After about five long minutes that I wanted to last forever Laura was all lotioned up. Her body glowed, no body could ever look as good to an 18 year-old boy as hers did right then.
"Would you do the same for me please Laura?"
"I am sure Matt would be delighted to be of assistance. Wouldn't you Matt?'
"But he's my brother I don't want his hands all over me."
"Yes but he would love to get his hands all over you and he would be very happy to do anything you wish to be allowed to. Let the boy answer."
I knew what I wanted but I had no way of saying it. I just looked at my sister who looked almost as confused as me. Laura offered me the lotion bottle and pointed at Karen. I did not need asking again. By the time I got to her Karen was lying on her stomach. As I had never touched any part of her body even spreading and rubbing in lotion on her back was exciting. Karen went as if to scream when her bikini top was unfastened but stopped when she saw it was Laura who had done it.
I realized that it was time to move down to do Karen's legs but was hesitant. I put lotion below her knees and worked this in thoroughly before moving higher. I am not sure whether the fact that it was my sister had any bearing on my excitement level. My hands were well below her bottom but my eyes were glued to it. Laura told me that the worst sunburn was always where clothing rubbed and that it was important to cream under the pantie line. I knew she was trying to embarrass both of us but slid my fingers under the elastic of Karen's bottoms. Her reaction was to close her legs together and tighten her cheeks. Laughing Laura said that it was time to turn over.
"But he will see my tits. He can't see my tits Laura."
"I had not realized how totally uptight you are. For goodness sake relax, chill out. It is lovely my little brother helps me in all sorts of ways now but we can talk about that later. Now turn over and be proud you have lovely tits."
She was right. I had seen my sister in tight tops and once or twice in just a bra but lying on her back topless they were stunning. The fact that she was my sister did not seem to concern my prick that tried to get even harder than before. I started on her shoulders but boldly moved quickly to her boobs. Her nipples immediately sprung to life and she gasped. I was surprised that they felt rubbery and very firm.
It was as if it took her a minute to register that it was her little brother stimulating her nipples.
"Stop, stop you can't do that to me."
"Your words are no but your nipples are saying yes please."
With that Laura took hold of one of my sisters nipples and played with it with a roughness that surprised both Karen and me. Karen went quiet and her eyes seemed unable to focus. Her breathing also changed and the tension in her body reduced.
"See if you chill out you could let your little brother both enjoy himself a little and also help you relax a little. I have taught mine to prepare me when I am going out with my boyfriend."