I was slightly drunk and didn't mind the attention as I leaned over in my tight dress. My tits spilled over a little as I puckered up to blow out my candles. Joao pulled me in as I bent over the table. I could feel through his jeans that his cock was getting hard and he wanted me to know it. He loved me in this dress. As I leaned in, someone shouted, "Make a Wish!" I laughed to myself. Honestly, what could I wish for? I was born wealthy, beautiful, popular. I truly had it all. Joao's hand wrapped around my waist. He had such strong hands, rough and powerful. I wondered what it must be like to feel so much power in your hands. It must be fun, I thought, to be able to be so physically dominating...

I blew out my candles. I was 19.

Across the table from us was my sister. That bitch. She couldn't help but look stunning. 5'7" with long blond hair, she was perfection. Pink puckered lips and giant green eyes. She was 22 and off to Milan in a few weeks for a modeling gig. The party was half birthday celebration, half going away party.

Tipsy as I was, it wasn't hard for Joao to lead me up the stairs to my room. Once inside he pushed me against the wall. Lusty and drunk, his tongue and hands groped my body. He pulled my dress down so that my tits were exposed. He grabbed my large breasts with those rough hands of his, licking and suckling my nipples with thirst. I submitted to him. I felt my panties quickly soak with anticipation. As if psychic, he bent down and began to lick me. I was already near orgasm. He stood up and plunged his cock inside of me. His thick cock was rock hard. I began to cum almost immediately, my juices pouring onto him. He shoved deep inside of me before exploding, our bodies pressed together in mutual orgasm...

The next thing I remember is waking up. I was alone in my room. Confused, I wondered where Joao was. All of a sudden, I felt a burning in my feet. It was a tingling sensation, followed by a stretching feeling, like my toes were being pulled forward. The feeling began to spread upwards. My calves now felt like they were swelling and tingling all over. What the fuck was happening to me? Was I that drunk? I kicked my sheets off but I could barely see anything in the dark and my feet burned too much to stand. The sensation continued to spread. Now my thighs and ass cheeks felt like they were swelling and becoming harder. The tingling then began in my hands and quickly spread to my arms. Then my chest... my fucking chest! It felt like it was being ripped apart. I grabbed my chest and I felt... were my breast shrinking? What the HELL? My chest was expanding and becoming hard. In fact, my whole body now felt hard and swollen... like... a man's? I shook my head. This couldn't be happening, this has to be a dream, I thought. But I was definitely awake. Then, I felt it. My crotch... I reached down, hoping to god I found the trimmed young pussy I went to sleep with. But no. The tingling sensation had sealed up the slit of my pussy and I felt a cock and testicles push their way into existence, getting larger each second.

The tingling stopped. I blinked. My eyes had begun to adjust and I was now looking down at my new body laying in bed. I shook my hips a little and I could feel my new member flop heavily between my legs. I was a man. I got up and turned on the light to look in the mirror. The reflection in the mirror was Joao, my sexy hung, Brazilian boyfriend! I wanted to scream.

More than anything however, I had to take the piss of my life. The bathroom was down the hall so I grabbed a towel. I tried to tiptoe so as not to wake my sister as I passed her room. The door was open. She had fallen asleep with the tv on and I could see her curled up on top of the sheets. She was wearing a lace bra and panties. I stopped. It was funny because although I had seen my sister every day of my life, I felt like I was just seeing her for the first time. Her breasts looked so soft and inviting. Her long hair fell over her like a blanket. Those lips. I couldn't help but stare longer. Something was different. I was seeing my sister through the eyes of a man.

Then I felt it. My cock twitched. Blood began to run to my groin. It was so different than being excited as a girl! I felt more warm blood throb into my cock. I grabbed myself with my hand. I began to stroke my thick dick, my eyes still lustily searching my sisters sleeping body. This was terribly wrong, but I couldn't help it. I wanted her. Feeling brave, I walked into the room. I dropped the towel. I was standing above her now, jerking steadily. Suddenly, she woke up. Terrified, she sat up. Speechless at first, she then stammered..."Joao...!" She sat back in the bed. Her terror only turned me on more. I felt so powerful standing above her as she sat there, scared and weak. I leaned in and grabbed her by the back of her hair. She looked up at me with those big green eyes. Her pouty mouth quivered. I plunged my tongue inside of her mouth. Surprisingly, she returned the kiss! That whore! Was she after my boyfriend this whole time? Were they going behind my back? I was suddenly filled with rage, but still incredibly horny. This bitch needed to learn her lesson. I stood up in front of the bed and pulled her forward so she sat on the edge, facing my crotch. I grabbed her by the hair and held her head so that her mouth was inches from my hard cock. I watched her face to see what she would do. Like a good whore, she opened her mouth. I pulled her head away. "You little whore..." I said, "You love to suck cock, don't you?" She nodded. Had they played this game before? I felt sick to my stomach. I pushed her head away, I couldn't look at her. But my cock was now raging hard, hovering in front of her face. Angry as I was, I put my hands behind my head and let her take over. And she did. WOW. Her pretty lips wrapped around my member tightly. Her mouth was so wet as she thirstily sucked me off. She ducked down lower and began to suck my balls. Fuck. I didn't know anything could feel so good. I was nearing orgasm already. But I didn't want to cum like this. I grabbed he and pulled her away from me. I pushed her onto the bed. She was still wearing her lace panties. I took the front of her panties between my hands and tore them. I climbed on top of her. My sister, the girl I had known my whole life, was now staring into my eyes, waiting for me to fuck her with my giant cock. I couldn't believe this was happening. I grabbed my cock and plunged it inside of her. Her pussy was tight and soaking wet. My cock began to throb and pulsate. I grabbed one of her tits tightly as I felt myself explode into her...

I woke up. I could immediately feel my small feminine body again. What a fucking dream!, I thought. I got up to go use the bathroom. I passed my sisters room and saw her sleeping, a pair of ripped panties on the floor...