Excitement and exhaustion from losing my virginity to Kelly, instantly turned to panic. Kelly jumped off me and quickly put on her bra and panties, slipping her white lace top back on, too. I leapt off the bed, scrambled around for my clothes and, without putting them on, quickly ran next door to my room and closed the door. Seconds later, I heard Tina climb the stairs and enter her room, greeting Kelly, who had stayed in there, with what sounded like a kiss and a giggle. That was too close, I thought to myself as I got dressed for the second time.

After waiting a short while, I decided to go downstairs to greet my sister. She cannot have suspected anything, or I would have heard her kick off. As I entered the kitchen, Kelly and Tina were sorting the food that Tina bought and putting it away in the cupboards. I noticed something that I had never really noticed before when I looked at Tina. She was actually quite hot. Not quite as sexy as Kelly, but still sexy nonetheless I thought. Her body was thinner and more slender than Kelly’s. Her breasts were smaller and more petite, but she wore a tight top and shorts which only accentuated the shape of her figure.

Tina turned around to look at me.

“So what are you doing this afternoon, Dan? Kelly and I are going swimming in the pool.”

“Oh, nothing. Just watching TV, I guess” I replied, reluctantly.

“Why don’t you come and join us in the pool? It’s a nice day for a swim.”

My sister smiled at me. She certainly seemed a lot happier now Kelly was staying for a few days.

“Oh well, okay then, thanks” I muttered, but my head was wondering if I could handle being in the pool with both Kelly and my sister. I was soon to find out.

Later on, I changed into my trunks in my room, then went downstairs to join Kelly and Tina who were already in the pool. They were both wearing bikinis. Kelly wearing a bright red bikini which ould barely contain her large breasts, and my sister wearing a pink one. They both looked so hot. I wondered if I was doing the right thing by joining them in the pool, but it was too late to turn back.

They were just splashing in the water when I approached, wearing nothing but my trunks. They both looked at me as I walked up to the edge of the pool. Tina smiled and Kelly grinned, both beckoning me into the water. I slipped into the pool. The water was warm, but cooled me as I swam about in it. Kelly and Tina were still splashing each other, but I noticed that through their wet bikini tops I could see perky nipples protruding. This was starting to turn me on big time.

I kept my distance, but it was all about to get hotter than I expected. Tina and Kelly were now stood at one end of the pool, kissing passionately. They flicked their hair back and embraced, running their hands over each other. Kelly noticed me looking, and as I turned away to pretend I was not, they whispered something between them and Tina giggled. The next time I turned back, they were locked in embrace again, but this time Kelly’s hand was fondling my sister’s breasts through her bikini top.

I could not believe what I saw next. Kelly reached around, and lifted off Tina’s bikini bra, tossing it aside and exposing my sister’s petite but perky tits. Tina did the same with Kelly, though Kelly’s tits were definitely bigger than Tina’s. They seemed oblivious to my presence as they fondled and kissed each other, while I just stared. Then, they both turned to look at me.

“Don’t just stand there and stare, we need some help over here, bro,” said my sister with a smirk and a wink.

My jaw dropped, but I obliged and swam over to them.

“Kelly tells me you have nice big cock Dan. Drop your trunks so we can see it.”

Again, I was shocked, but I obliged though the lower half of my body was still underwater.

As I took my trunks off freeing my growing cock, they both removed the lower half of their bikinis, but again, their pussies were underwater. They then climbed out, fully naked, beckoning me to do the same. As I did so, I got the first glimpse of my sister’s pussy. It was smaller than Kelly’s and looked much tighter. It was smoothly shaven and wet, but whether that was from the pool or not, I could not tell.

Kelly took hold of my hand, and led me over to the lounger, where I lay back presenting my erect cock upright to these two hot girls. They knelt either side and Tina took my cock into her hand as she started to stroke it gently. Kelly fondled my balls, then she and my sister kissed again. Tina then set to work fondling, stroking, kissing and sucking my cock, but in a gentle and delicate way, making my whole body tingle. Kelly got up and swung one leg over me, presenting her wet pussy to my face.

I began to lick as I pushed her body towards me, she spread her legs even more allowing me to put my tongue inside. With Kelly moaning and Tina still working away at my cock, I was close to cumming. Sure enough, within seconds, I came, while my cock was still in my sister’s mouth. At that moment, Kelly let out a yell and she came too with a powerful orgasm, dripping her warm juices onto my face. Tina swallowed my cum and licked my cock dry.

“We’re not done with you yet, Dan,” she said, massaging my cock as it started to fall limp.

Tina and Kelly quickly swapped places, Kelly pushing my legs apart and taking my cock into her mouth this time. She was more firm and seemed more experienced than my sister, and it did not take long before I was rock hard again. Tina, meanwhile, had lowered her tight pussy onto my face and spread her legs to open it out slightly. She fondled her tits as I licked and kissed her pussy, still struggling to believe that I was actually licking my sister. She tasted good, even better than Kelly.

Both girls then stood up, kissing and touching each other. Kelly then helped lower my sister onto my big, throbbing cock. As it slipped inside her very tight pussy, she let out a moan, half pain, half pleasure. With Kelly’s hand rubbing her clit, Tina began to move up and down on my cock, kissing Kelly as she did so. God, she was so tight, but it felt so good.

Her pace quickened, and she starting panting and letting out long moans. This was along with the sound of our wet bodies slapping together as she rode me, as Kelly let me play with her tits with my free hands. My sister then shuddered and let out a scream as she reached orgasm. I could feel her juices dripping down my cock as it happened twice in just a few seconds.

She climbed off me, panting and rubbing her clit, pulling me up with her. Kelly then moved in, standing facing me and pulling me tight in towards her tits. She kissed me, forcing our bodies together and my cock slid into Kelly’s much larger pussy. I started to thrust, fucking Kelly at a high pace. My sister was knelt behind her, seemingly licking and kissing Kelly’s ass.

Feeling close to cumming again, I pulled out of Kelly and moved away. She knelt down beside my sister, both looking up at me as I stroked my cock. I stared down at their beautiful faces and glistening wet tits. I came, squirting half of my load onto my sister’s tits and quickly moving to squirt the rest on Kelly’s. I then collapsed on the floor, closing my eyes and panting after that rush of pure ecstasy. When I opened them, I saw Tina lying back next to me, with Kelly over her, licking up my cum off her tits.

My sister turned to look at me, flushed, worn out, but smiling. She pecked a kiss on my lips.

“Thanks, Dan. I needed to find out what cock was like and yours was amazing. I could not have wished for a better first time cock.”