I would like to introduce my family to you. I'm a twenty-two, six foot 3-inch male with a muscular body, short brown hair and an eleven-inch cock. My sister Penny is a nineteen-year old, five foot seven inch hottie. She is very slim with a nice, tight round arse and 36DD breasts. She likes to wear as little clothing as possible, like short shorts and mini skirts, and tight fitting shirts and tanks. And she is a big flirt. We live with our mother, Paige who looks a lot like Penny with slightly smaller breasts. She works as a nurse in the ICU in the town hospital. She works long hours, which leaves Penny and myself alone at lot of the time.
Anyway this is a story about Penny and my first time together. I came home from work one hot summer day to find Penny and her current boyfriend, Brett swimming in our pool. I walked to the lounge window and watched them swimming and splashing around in the pool. From what I could see, she was wearing her white string bikini, which becomes see thru when wet. Penny swam into his arms where they kissed passionately, Brett pulling at her bikini top strings and her top fell off. Penny grabbed her top and broke away from him and slapped him across the face. She got out of the pool, still topless and ran inside. When I found her in the kitchen, she had her top back on and was sitting at the kitchen table, crying.
'What's wrong, sis' I asked, not letting on what I saw.
'It's Brett, he wants to have sex with me and I'm not ready for that yet. I'm waiting for the right guy before I loose my virginity. I told him that when we met but all he wants is to have sex with me.' She stood up and I gave her a hug, her hand resting just above my arse and my hand just above hers.
I went out into the back yard where Brett was still swimming and I told him to fuck off and to leave my sister alone. Don't call her or nothing and if I heard anything, I would kill him. He got out of the pool, grabbed his stuff and walked down the side of the house. I followed him to his car just to make sure he was gone.
I went back into the house to find Penny had left the kitchen and went to look for her. I found her laying on her bed, on her stomach still in her bikini, her tight round arse clearly visible. I sat on the bed next her and slowly rubbed her back telling her that he was gone, for good. She sat up and gave me another hug. I could feel her tits squashing into my chest. I felt my cock starting to squirm in my shorts. She broke off the hug and gave me a quick kiss on the lips and went for a shower.
I walked passed the bathroom on the way to my room and noticed she had left the door open. I stood in the doorway and watched my sister having her shower. She was rubbing her tits with soap, her nipples erect. Then she ran a hand down her stomach towards her pussy. She hand the soap in her hand rubbing it in circles around her clit. She was moaning softly. The soap slipped out of her hand, and when she bent over to pick it up, she noticed me standing in the doorway, playing with my cock through my shorts. A look of shock came over her face quickly before inviting me into the bathroom.