“Hey, Sis, you ready to go swim yet?!” I called upstairs to my sisters, Emily, room.

“One minute, let me put my new bikini on!” She replied back.

Mmmm, I thought, as I pictured my sister naked, putting on her bikini. I had seen Emily in a bikini before, of course, but now that I was 14 and she was 16, my hormones were taking control of me and I realized how beautiful she really was. She was about as tall as me; had deep brown eyes, silky dark black hair, and perfect C cups tits with an incredible tear drop ass.

My sister and I have always been really close, so we would often talk about sex and whatnot. She had already told me how she had sex with her boyfriend, Zach, when she was 14, just before he moved to California; but had never had sex with anyone after him. I, unfortunately, had not had sex yet. We talked about how we both loved masturbating and how I always used lotion and how she had her own favorite dildo that Mom had given to her. We both really loved just talking, no matter the subject.

Five minutes later, Emily came walking down the stairs. My mouth fell open a bit as I saw her. She was wearing a thin, plain white bikini that she had purchased from Victoria’s Secret.  The bikini was obviously too small for her, as her top did not cover her entire tits and showed a great deal of the top of them and a bit of under-cleavage. The bottoms were the same; barely showing the sides of her shaved pussy lips.

She came down smiling, and then started to giggle devilishly, staring at my bathing suit. She then put on a cute face.

“Awwww, you’re wearing the Speedo I bought for you!” She said, chuckling. “You look great in it! You really fill it out!”  

“I was about to say the same thing about you!” I told her, playfully slapping her ass as she passed me. She giggled and pushed me away, walking toward the pool in our backyard, her bikini bottom squeezing into her ass every step she took. I moaned to myself and followed her. My 5 ½ inch boner had been up the whole time, but she didn’t seem to mind.

She stopped and sat down on a lawn chair and looked at the pool. I followed her gaze and saw Mom and Dad slowly getting out of the pool, both with big grins on their face. They walked towards the door and then stopped and faced Emily and I.

“Hey, kids,” my Dad addressed us,” I’m gonna go spend some alone time with your mother.” At this he squeezed Moms ass. “Have fun!” Mom giggled and walked off with Dad, grabbing his cock.

Emily stared after them; a smile on her face.

“Horny little guys aren’t they!” She said. We both laughed. Emily then stood up and grabbed a brown bottle from her chair, flipped off the top and poured a white substance from it on her hand. She then handed the bottle to me as I bent down to take off my shoes.

“You mind putting some sun-tan lotion on my legs, please?” She said, looking down, giving me a cute smile. She started to wipe the lotion on her stomach.

“Err…”

I was hesitant.

She looked down again, giving me an exasperated look. “Oh don’t be such a pussy!”

I looked at her and laughed.

“Then stop being such a bitch!” I laughed, smacking her ass, hard, again.

Emily jumped and laughed. “There ya go.” She stuck her hands in her bikini top and lotioned her puffy tits. I watched eagerly for a moment. I’d seen her tits before, but now, because of my hormones, I looked at them from a sexual point. She didn’t seem to notice.

I poured a large amount of lotion in my hands and started to lather away. First starting at her feet, I worked my way up her beautiful legs, savoring every inch of her skin. I rubbed her quads and finally reached her ass. I lathered it very slowly and smoothly, sticking my hands between her ass cheeks quickly. Then, going to her front, I motioned my hand very quickly over her bikini bottom, barely touching her pussy lips that slightly protruded from it. I was so incredibly horny; my cock portrayed that.

I stood up and looked at her. She was biting her bottom lip and had her right eyebrow propped up. “You did a very thorough job.” She grinned.

“Well, I don’t want to see my beautiful sister get sun-burned, now do I?” I said, pushing my chest into her and wrapping my arms around her. I started to playfully kiss her neck while massaging her ass cheeks. Her puffy nipples felt great on me.

“Stop it!” She teased. She pushed across my chest in an attempt to push me into the pool, but I grabbed her hand and took her with me. We both surfaced the water, laughing hard at each other.

“Oh you’re so stupid!” She screamed, splashing water at me.

“What!” I called. I moved to her and started to tickle the sides of her tits and pussy lips. She started to laugh hard. “Oh stop it! Stop it!” She laughed, splashing water everywhere.

I stopped after a second, laughing. She had a wide grin on her face when she looked at me. We both stared at each others eyes for a moment.  
 

She’s so beautiful, I thought.

We started to move towards each other. We put our tongues together and kissed.

Tell me if I should right part two, thanks for reading.