My brother Josh and I are both kind very shy and 1 year apart in age. My brother is 5'10", a little muscular and manlier than me at 19. I am 18, 5'6", 120lbs, 3" pencil thin cock, with tiny balls, and my body is hairless. In the last year I started developing small breasts on my very petite body. I was told by my doctor that I have female hormones in my body competing with the male hormones, causing me not to develop as more manly. I have always been into dressing up in my Mom's and sister's clothes whenever no one was home. Melissa is my fraternal twin, shy like us but sexy. She is 5'8", 130lbs, pleasantly curved, with small pert breasts.
Our Mom and her boyfriend left for their annual 3 week summer trip to Mexico. The first night we were watching some softcore porn on cable and drinking some alcohol together. We got to talking about girls, and Josh confessed to me, "Bro, I really need to be with a girl but I am so nervous, since I have no experience and never kissed one."
I was more than a little drunk and blurted out, "I'd be willing to put on some of our sister's clothes and let you make out with me for practice."
He looked at me like I was a freak and I started to say I was sorry...but he stopped me and told me that might work. "Dude, you would do that for me?"
"Sure bro...because I love you. I'll be right back." I rushed upstairs knowing exactly what clothes I would put on because I had done it before.
I decided to raid Melissa's room first. I stripped down, dropping my clothes. It was erotic to be in here naked. Opening her underwear drawer, I found a pair of frilly pink thong panties. I slid them up my thighs, feeling the odd sensation of silk around my cock, which was growing erect against the fabric. I put her bra on my chest. It was a little big for me but it pulled my breasts together and made me look quite sexy.
Next I went into Mom's room and found her thigh-highs. I slid them up my legs, and then over the top of it, I added a miniskirt and a cami which made me have curves and fit snugly around my hips. Leather thigh high boots and a blonde wig completed the effect and I thought I looked great.
I wobbled my way downstairs on the heels and Josh turned and said, "Wow, you turn into a very sexy woman."
I blushed and sat down next to him. Josh was intoxicated and horny, and it was like he forgot who I was and just grabbed my face and started kissing me very sloppily, with his tongue deep in my mouth. He was groping my breasts and it was really turning me on. I felt his hand grab mine and direct it towards the bulge in his pants and I don't know why, but I let him. His cock felt huge as I traced it with my fingers. It had to be 4 times thicker and maybe 3 times as long as mine. He moaned in my mouth as he guided my hand into his shorts. I gasped as I felt that thick cock in my hand and started stroking it. I disengaged from his kiss and leaned down like I saw in the videos and kissed his cock as he slipped off his shorts. I sucked and licked his cock and it wasn't long before he grabbed my head as I felt him spasm in my mouth. I tried to move off but he held my head down as he came and I could do nothing but swallow. As I licked him clean he groaned and said, "Oh my god, that was the best thing I have ever felt." Josh went up to bed and I peeled off the boots and Melissa's clothes. I put away the clothes and went to bed.
I woke up the next morning and Josh was already gone to the gym. I remembered the feeling I had wearing panties so I dressed putting on the panties under my pants and went out for a drive. As I was driving I noticed an adult bookstore and went in slowly as I was nervous. I was overwhelmed by all the videos, toys and clothes. I started walking around and noticed these shemale and transvestite videos. I thought wow, that is basically Josh and I. A stud with a big cock and a tiny cock shemale. I grabbed a couple not knowing if I could go through with buying them. When I looked towards the counter there was this incredibly hot 20 something year old girl. I slowly walked toward the counter and the girl smiled and said, "Hey don't be worried, we don't care what you buy as long as you buy."
We chatted for a few minutes and she looked at me and said, "Do you like being the girl?"
I blushed and nodded my head yes. "I have the perfect small breasts to go with it."
"You have a great build for it. Hey, my name is Kara."
"Nice to meet you."