Some days after her first anal experience, Valentina, my sister, went away with a girlfriend. It was the middle of the summer, and she said she wanted to travel and have some rest from everything that surrounded her. I guess that included me. Valentina traveled with Joanna, a good friend of hers, who was also my friend Matt’s girlfriend.

Valentina and Joanna went to Florida, and during those weeks, she barely communicated with me. I supposed she was mad at me because I had fucked her ass even though it was clear she had done it voluntarily. Maybe there was something else, another reason why she wanted to be far from me.

The time passed, and one day I was in the kitchen fixing a sandwich for my lunch when I heard the door of our house open. I went to the living room, and there was Valentina with her big backpack. She smiled at me and rushed to hug me.

“I missed you,” she said smiling.

“Me too! How was your trip?” I asked out of curiosity.

“Man, that was awesome! We had a great time. I have many things to tell you. But I have to take a shower first… Wanna join me?” she asked while winking at me.

“Sure!”

We went to the bathroom. She took off her top and her bra, and exposed her nice big boobs. I took off my t-shirt and boxers, the only thing I happened to be wearing, and she removed her pants. We got into the shower, turned on the tap, and while the hot water fell on us, we kissed and touched our bodies. How much I missed her! I fingered her for a couple of seconds while she stroked my cock, and after that I penetrated her. It felt so good to be inside my sister again. Our game lasted just for a few minutes because we both soon came. I could tell she missed fucking me too.

Later, we went out for lunch, and as we ate, she told me more details about her trip. She mentioned places she visited, things she did, and then she confessed something I didn’t even imagine she would do.

“Hey… there’s something you must know… And please don’t get mad like the last time.”

“Um… Ok… What is it?”

“Don’t ask me why, but I ended up having sex with Joanna.”

“What?” I couldn’t believe what my sister had just said.

“Yeah… One night, Joanna and I went to a disco. We drank a lot, and there were hot guys flirting with us. We danced with them, but we didn’t do anything. I guess we were so horny that we got back to our hotel we ended up kissing and having sex.”

“Gosh! So… How did you feel? Did you enjoy it?” I asked.

“Yeah… It was fun and… Sexy. She’s so erotic… Yeah… I enjoyed it. Now… There’s another issue.”

“What’s that?”

“We both revealed some dark secrets to each other. I mean… I guessed that was one of the reasons why we ended up in bed… That night at the club, we started playing dirty questions… A kind of truth or dare, but just with truths. At some point, I ended up revealing you and I have been having sex…”

“What? Are you crazy? Why did you say that?” I asked angrily.

“Hey… I told you… We were drinking and… we were playing this game and having this talk and… Anyway… She’s fine with that. She was surprised, but I told her to keep the secret… And she will. I know she will.”

“I don’t get it! You shouldn’t have opened your big mouth!”

“Hey, chill out. Listen, there’s something else.”

“What? Did you tell her I fucked your ass?”

“Stop! You’re acting like an asshole! Look… She also told me something about her and Matt. They kind of like to have other people with them, when they’re having sex, I mean, especially threesomes with other girls. Actually, Joanna proposed that I should have sex with them,” my sister confessed.

“Wow! So now you want to experiment more things, and you’re going to fuck Matt too, huh?”

“Shut up! I won’t do that! I told her we could get all together. You know… Have a foursome.”

“What do you mean?” I asked naively.

“Gosh! That means I want to do this with you. Don’t you think Joanna is hot?”

“Well… She’s fine… I mean… Yes, she looks good.”

“Okay, so what do you think?”

I ended up accepting my sister’s proposal. We would have a foursome with our friends. I had known Matt and Joanna for a couple of years now, and I thought we could do that without feeling uncomfortable.

My sister was in charge of talking to Joanna and letting her know we would have sex with them. Then some days later, I bumped into Matt at a gas station.

“Dude! Joanna told me you and Valentina are in for this little, um, game,” he said enthusiastically.

“Yeah… It’s, uh, awesome,” I answered nervously.

“Isn’t it? Man, I have always wanted to be with your sister. She’s just so hot. I mean, I like Joanna a lot, but if only she had such jugs as your sister does… Wow! I just can’t believe it.”

“I know.”

“Joanna told me about you two. I just want you to know I’m totally fine with that and your secret is safe.”

“Thanks, man.”

I was just speechless. On the one hand, I found it exciting to be part of this foursome, and I even thought it would be so arousing to see my sister being fucked in front of me. I mean, some weeks ago, I had seen her fucking my cousin, something I just couldn’t stand, but this was going to be different. I just didn’t want people to know what was going on between us, so I really hoped Matt and Joanna could keep this secret.

We also talked about creating the right mood for that special night, which would take place the following Saturday, just four days ahead. We said we should buy some wine and maybe plan a game as a warm-up for the big moment. Matt said he would be in charge of planning the game and I could buy the wine and some snacks.

The week passed quickly, and the day finally came. Valentina started to get ready early in the afternoon. She looked hotter than ever. I felt so anxious and excited and wondered how everything would turn out. We had agreed on meeting at Matt’s place at 7 pm, so at about 6:30, we left our house. When we got there, Joanna had already arrived, and Matt was finishing cooking something in the kitchen.

“I made us some salmon. I hope you guys like it,” he said.

Joanna laid the table, I poured some wine, and Matt served the food, salmon, a purée and some vegetables. Everything tasted so good. We talked a little bit about the summer, the girls’ trip and some other plans before classes started. Joanna even suggested going on a road trip with Andrea and Freddie, two good friends of ours.

We finished dinner and moved to the living room. We grabbed our glasses, and I brought another bottle of wine. There was a sensation of excitement and nervousness in the air. It was Matt who broke the ice. He suggested playing Truth or Dare, and the rest of us accepted his proposal. Matt brought a set of cards, and we all sat in a circle on the carpet.

“Ladies first,” Matt said. “We’ll begin with Joanna.”

“Why me?” Joanna inquired.

“Because you’re on my right. So… Truth or dare?”

“Um… Truth.”

“Okay.” Matt grabbed a card and read it. “Have you ever had sex outdoors?”

“Wow… Um… Yeaaah. It was last year. Freddie fucked me next to the university soccer field. There were some bushes near the field, that’s where we had sex. It was late at night, and nobody was around. It was pretty exciting.”

“Gosh! You fucked Freddie?” asked my sister. She was surprised because we had never heard about it, plus Freddie was dating Andrea, our friend.

“Yeah, but just that time. We had been drinking after a game, you know, and… Things just happened.”

“Alright. Valentina, you’re next.” Matt announced. “Truth or dare?”

“Dare,” my sister called.

“Well… lick someone’s ear for thirty seconds.”

“But whose?”

“It’s your choice,” said Matt while he set his cell phone’s stopwatch.

Valentina turned her head towards Joanna, held her waist, and slowly directed her mouth towards her right ear. Joanna grabbed my sister’s arm and caressed it while she moaned softly at the same time. I could tell it totally aroused Joanna.

“Time’s up,” called Matt. “Your turn, dude. Truth or dare?”

“Truth,” I chose.

“Have you ever measured the size of your penis? If so, what’s its size?”

“Ha-ha… Well… Yeah, I have measured my dick… It’s, uh, seven inches long, I think.”

“Um… That’s good,” said Joanna in a sexy voice. “So, it’s your turn, honey,” she added. “Truth or dare?”

“Truth,” Matt chose. Joanna took the top card on Matt’s deck.

“Have you ever fantasized about being in a porn movie?”

“Yeah! Sometimes I think it could be a good career choice. I mean, being paid to fuck! That’d be awesome!”

We all laughed. Then after a pause, Matt told Joanna it was her turn. Joanna picked dare.

“Lick someone’s intimate parts for thirty seconds,” said Matt.

“Oh gosh! Who should I choose? Um, I guess I won’t taste yours so much today,” said Joanna while she put her hand into Matt’s shorts and took out his dick, which got totally erect in less than five seconds. Joanna put Matt’s thick cock into her mouth while my sister and I watched curiously. It seemed it took longer than a minute since Matt was not really taking the time, so I had to tell them to stop.

“Wow! That was hot,” said Valentina. Matt put his wet dick back into his pants, and almost out of breath told my sister to make her choice.

“Truth!” She said.

“Have you ever had sex in a pool or the sea?” Asked Matt.

“Um… Ha-ha. I have. Actually, Joanna and I did it in the ocean on our trip to Florida,” my sister confessed.

“What?” Said Matt totally surprised.

“Yeah… It was this hot afternoon. It might have been around 6 pm, and it was still so hot. We were swimming but it was so packed that we decided to move away from the crowd. We walked and got to this area that was kind of lonely, and got into the sea again. We started making out and began to have sex there in the water. It was fun!”

“You didn’t tell me about it,” I said.

“I don’t have to tell you everything I do, Andrew,” replied my sister.

“Well, Andrew, it’s your turn,” Matt said.

“Dare!”

“Dude, kiss someone’s cheeks for thirty seconds.”

I moved towards Joanna, who uttered an exclamation of surprise when she saw me grabbing her legs to make her turn around. She lay face down, I pulled down her denim shorts and underwear, and put my mouth on her ass. I started kissing her cheeks, softly, slowly, some kisses here, some kisses there. Then, I moved her cheeks and got to see her asshole, so I targeted her little hole and licked it. She moaned and I could tell she liked it. But that’s when Matt said time was over.

“Oh my gosh, Andrew,” said Joanna while she pulled up her shorts.

“Next! Matt, what’s your choice?” Valentina Said.

“Well, truth,” he said.

“No way, you picked truth in the previous round,” complained my sister.

“Okay, okay… dare, then,” Matt said.

Joanna picked the top card from the deck and said, “You have to show your butt, and someone in the group must draw an imaginary smiley on it by using their tongue.”

“And who’s gonna lick me? Not Andrew, please,” Matt demanded.

“I will,” said my sister.

“Oh, yeah, baby,” said Matt happily.

Matt stood up and got in front of my sister, who knelt and pulled his pants down. Matt leaned a little bit, and Valentina started to draw the imaginary smiley on his ass. Matt’s erect cock pointed to the ceiling. Valentina finished, and Joanna and I clapped.

“Okay, final round,” Matt announced. “Only dares from now on. Honey, this is what you have to do,” said Matt to Joanna while he picked a card. “Do a strip tease with some background music.”

“Oh gosh! No!” said Joanna complaining.

“Yes, you have to do it,” said Matt. “I have a perfect song on my cell phone.” He searched through his cell phone music library and played a song. The melody of “Girl, you’ll be a woman soon” got into our ears.

Joanna sighed and stood up. She started to move sexily, executing some rhythmic steps while she slowly touched her legs, and waist, and belly, and breasts. She put her hands back on her waist and moved them towards the center, and unbuttoned her shorts. Then she unzipped them and let her shorts fall down. Her red underwear was revealed as well as her well-formed ass.

She continued dancing slowly and pulled her shirt up, little by little, until she took it off. She wore a sexy red bra, which protected her nice little boobs. She kept on moving and advanced to where I was sitting. She moved closer and closer until her pelvis was in front of my face. I could smell the sweet aroma that came from her pussy. I put out my tongue and licked it. She stepped back, put her hand behind her back, and unfasten her bra, letting it fall too. Her nice perky small tits were revealed. I felt like eating them right away, but I had to be patient.

Finally, she moved close to Valentina, and started to pull down her panties very slowly. When she took them off, we all clapped, and Matt stopped the music.

“Alright! Valentina, here’s your dare,” said Matt. “You have to play with someone’s genitals for thirty seconds. So, who‘s it going to be?”

“Do you guys wanna see how I play with Andrew?” she asked, looking at Joanna and Matt.

“Yeah, that’ll be hot,” said Matt.

Valentina crawled very slowly towards my spot. Matt stared at her intently. I could see how much he wanted to fuck her. Valentina unbuttoned my shorts and took them off. Then, she did the same with the boxers I was wearing. She grabbed my cock, stroked it, and leaned to reach it with her mouth. She licked my tip and then started to suck it unhurriedly. I moaned and caressed her hair. It felt like she had had my cock inside her mouth for just five seconds when Matt said, “time’s over.”

Valentina went back to her place, and I could see Joanna looking at my erect penis. Matt said it was my turn, grabbed a card, and announced my dare.

“Give a boob massage to one of the girls in the group for thirty seconds.”

I stood up, went out of the circle and stopped behind my sister.

“Alright! This is gonna be hot,” Matt exclaimed in delight at the scene.

I told Valentina to raise her arms, and then I pulled her top all the way up and removed it. She was wearing a sexy blue bra. I could see Matt didn’t take his eyes off her big boobs. Then, I unfastened her bra and let the audience wonder with her marvelous breasts. Next, I grabbed them and started to move them gradually, first up and down, then to the sides, and then I massaged them and moved them gently in circles, taking care of her nipples too.

“Time!” Matt said, ruining this fun moment.

“The last one,” announced Joanna while she took a card. “Do a sixty-nine with someone in the group for thirty seconds,” she commanded.

Immediately, Matt stood up, took off his t-shirt, shoes, shorts, and boxers, and pointed at my sister.

“Lie down, honey,” he told Valentina.

My sister obeyed his orders, and Matt knelt down next to her. He put his hands behind my sister’s ass, and rushed to take off her skirt and underwear. Then he aligned his body with my sister’s, his knees next to her head while his eyes targeted her pussy. He lifted his left leg and pushed his big dick into my sister’s mouth while his tongue started to have a taste of my sister’s delicious pussy.

Joanna came close to me, knelt down, pushed my chest, which almost made my back touch the floor, and went down on me. I took off my t-shirt and placed my hands on her nice tits while she sucked my dick. Next to us, Valentina uttered some sounds of pleasure while Matt worked on her precious pussy.

Two minutes later, Matt stood up and told us to go to his room. We agreed, stood up, and got into his bedroom. His bed was not too big, but we all fitted there. Matt gently pushed Valentina down, got on top of her, and penetrated her. My sister moaned loudly while my friend began to thrust her. I lay down and told Joanna to get on top of me. She did, grabbed my dick, and put it into her cute pussy. She felt good. I touched her beautiful tits and moved my head to have a taste of them. I introduced her firm nipples into my mouth, and she moaned.

Next to me, Matt was busy fucking my sister. He moved fast, so fast that Valentina’s jugs moved back and forth so quickly as if they were going to explode. Joanna also started to move faster and faster,...