At the end of Chapter 1, my sister Diana slipped into bed with me in the middle of the night. She had been drinking heavily at a party earlier in the evening. I thought she might be sleepwalking. When she proceeded to suck my cock and then climb on top of me and slip it into her pussy, I had difficulty believing she was asleep. I probably shouldn't have cum inside her, but I did.
Afterwards, I didn't know what to say or do. Should I hold her? Should I pretend like nothing happened? Was she awake or sleepwalking? I never got any answers. Diana slipped out of bed, went into the shared bathroom, and never returned. One nagging thought kept me awake though. Was Diana on the pill? Could I have gotten her pregnant? I would have to wait until the next day for answers.
Chapter 2
Diana was still in bed when I finally came down for breakfast. Mom asked about the party the previous night. I assured her that we had fun and that Diana behaved herself. I didn't tell Mom she was three sheets to the wind when we got home, and I certainly didn't tell her we had fucked. After breakfast, everyone disappeared, some to the beach, some to the waterpark, and some to go shopping. I was still in the kitchen when Diana finally emerged.
"Hey, Nick. Where is everyone? I guess I slept in longer than usual."
"They all went in different directions," I replied. "Did you enjoy the party last night?"
"It was fun, but I had a little too much to drink. I was out cold as soon as I hit the bed. I can't believe I slept so long."
"And you didn't wake up at all?" I asked. "Not even to go pee?"
"I think I might have gotten up once," Diana answered, "But I really don't remember much. Why? Did I wake you?"
This was the second time Diana claimed ignorance after we fucked. Besides last night, we had fucked in the motel room on our way to the beach with Mom and Dad in the other bed. She denied that as well. She was either lying through her teeth, or she really didn't remember. To make matters worse, she had claimed she was still a virgin after the motel incident.
"No, but I did have some vivid dreams. Hey, I have a question. Are you on the pill?"
"What kind of question is that? It's none of your business. Besides, I already told you I was a virgin and I plan to remain that way, at least for now. Why would I need to be on the pill?"
"I'm just worried about you after last night, sis. You were pretty drunk. It would have been easy for someone to take advantage of you. You could black out and not even remember losing your virginity."
"That's crazy," Diana replied, shaking her head. "Believe me, I would know if someone took my virginity. Besides, that's not going to happen. I can handle myself when I drink. Now if you don't have any more stupid questions, I'm going to change and head down to the beach."
Diana grabbed a cinnamon bun and headed back to her room. I realized she never actually answered my question about the pill, only that she didn't need to be on it. That didn't give me a lot of comfort, but it did indicate that she was clueless about what had happened last night, if it happened. I was beginning to wonder if I was the one dreaming.
I changed into my swimsuit and followed Diana, watching her exposed ass cheeks sway back and forth against the tiny white bikini she was wearing. She saw the gang from last night's party and made a beeline towards them, waving as she got closer. They motioned me to join them as well.
Diana continued her teasing behavior from the previous night, soliciting volunteers to douse suntan lotion on her topless back. They took turns ensuring not only her back, but also her exposed ass cheeks were protected from the sun. I listened to her' oohs and aahs' and cautionary 'carefuls' when the fingers wandered a little too close to paradise. Diana finally fastened her top, rolled over, and sat up on the towel.
"I have to pee. Anyone up for a swim?"
Her admirers followed her into the ocean. As soon as the water was most of the way up her thighs, Diana squatted down and peed. The look on her face was one of pure ecstasy. When she was finished, she giggled and stood with her feet shoulder width apart. I'm sure it was just salt water that streamed down her thighs and dripped from her crotch, but the effect on those watching was highly arousing, me included.
After that she was hoisted up on the shoulders of different guys to play chicken. One tall boy chest deep in water removed his swim trunks and held them in the air. Not to be outdone, Diana took off her top and held it up in neck-deep in water. One of the boys snuck up behind her and stole it. When she tried to get it back, he threw her top to someone else.
This game went on for several minutes. Each boy held her bikini top high in the air and made her jump for it causing her tits to momentarily bounce out of the water. Then they threw it to the next guy who made her do the same thing. They tried to get her to move into shallower water, but Diana wasn't willing to go that far on a crowded beach. They finally gave her the bikini top and returned to where the rest of the group was sitting.
A game of truth or dare broke out. When it was my turn, I selected "truth" and was asked how long my dick was. I said seven and a half inches to yells of "bullshit". A peach was sliced open and one of the guys was dared to perform oral sex on it. He did a masterful job, spreading it apart with his thumbs and burying his lips and tongue into the sweet nectar. Juice was smeared across his face and dripping from his chin when he finished. He bowed to a round of applause.
It was getting near lunchtime. Diana and I said goodbye and headed back to the house. On the way, I asked her if she had enjoyed the performance with the peach.
"It was interesting," Diana replied. "He sure looked like he knew what he was doing."
"Really? And how would you know? Is that experience talking?"
"None of your business," she said with a teasing twinkle in her eye. "And what about you? Is your penis really seven and a half inches long?"
"Only when it's hard. Do you want to see?"
Diana punched me in the arm and told me to behave myself. We had arrived at the outside shower stall underneath the rental house.
"I'm going to wash off the salt water before heading in the house. I'll leave the door open if you want to find out whether or not I was lying."
I was not expecting Diana to take me up on my offer. I was just teasing her. After removing my trunks, I turned on the water and let it splash over my head and down my body. Then the door pushed open. Diana was standing there looking at me. Her expression was different somehow, almost as if her personality had changed. She was more confident, more daring, more adventurous. Her eyes wandered to my penis which hung limply between my legs.
"It doesn't look so big to me," she teased.
Not sure how to respond, I decided to up the ante.
"Show me your tits and it will," I challenged.
Without saying a word, this version of Diana stepped into the shower stall and locked the door. She reached back and unfastened the clasp of her bikini top. It fell to the floor. I had seen her tits before, but it was either through a small camera I had hidden in her room, or when she had slipped into bed with me and it was too dark to see. They were even more spectacular up close. I felt my cock begin to grow.
"You know it's perverted to get excited looking at your sister," Diana teased. "I mean they're just tits. I'm sure you've seen better ones looking at porn."
