The day Mom and Dad left for Vegas, they left me at the house for Kate to come and pick up. It was starting to get late, well after 10 when I finally heard a car pull up and the doorbell ring. I went to answer the door and was blown away when I saw Kate. She was wearing a very short pair of Daisy Dukes that left little to the imagination, showing off her tanned legs and a low cut white blouse that showed off almost all of her plump, round breasts. Her long brown hair was no longer drawn up in a ponytail like it used to be, but hung freely past her shoulders, ending in short curls.
"Hey Mikey, long time no see."
"Hey Sis, what took so long? I thought you were never gonna show up."
"Yea, I got held up late at work. It's too hot to wear my suit, so I had to go home and change. Come on, we've got a long drive back and I'm exhausted."
I loaded my duffel with with my clothes for the week in the trunk of Kate's old Corvette and hopped in the front seat. It was an hour and a half drive into the city, and in the dim light of the car I found I kept sneaking glances at Kate's nice tanned, smooth thighs. I thought she even caught me once, but she didn't say anything. After what seemed like forever, we finally arrived at Kate's apartment building. By now it was well past midnight.
"All this is is a one bedroom Mikey, so you'll have to sleep on the couch," she said in a tired voice.
"Fine with me, means I get the TV."
"I don't care how late you stay up, but remember, some of us have to work tomorrow, so keep it quiet."
"No problem, night Kate," I said back to her.
As she walked behind the couch toward her room, I got a nice view of her tight round ass, barely covered up by her shorts. I got instantly hard when I saw, but in the back of my mind I was hearing 'She's your sister, what are you thinking?' I figured I would watch some TV before going to sleep to take my mind off of it. I was still horny though, and once I was sure Kate had fallen asleep, found a nice porno movie on the late night channel.
I had been watching and jerking off for about 20 minutes when I heard a voice behind me "Well what do we have here." I bumbled around, trying to turn the TV off and stammer out an explanation. Kate turned the lights on and said "Well?"
"Umm, I was just surfing channels and uhh, this just popped up as you walked in."
"Save it little brother, I've been watching you for 10 minutes." When she said this, I finally looked up and made eye contact with her, and was once again blown away. All she was wearing was a little pajama top and a pair of white silk panties that showed off all of her legs. My hard on had gone away at the shock at being discovered, but seeing Kate dressed like that made my dick grow hard once again. She then walked over and sat next to me on the couch.
"Michael, you're a teenager, there's nothing to be ashamed of for jacking off, its natural." I didn't reply to this, just stared at the floor.
"However, I am curious about something?" she continued. "You're a pretty good looking guy, have you ever actually had sex?"
"No, all I've ever done is French kissing," I replied, a bit embarrassed to be talking about this with my sister.
"Uh huh," Kate went on.