"Bye, Katie!"
Katie looked up from surfing the web to wave to her parents out of her bedroom window as they backed out of the driveway. Katie's dad had just gotten a huge promotion at work, and to celebrate he was taking Katie's mom on a weekend road trip to Las Vegas, some fifty miles away. They said they wanted to 'experience the thrill of Sin City', which Katie took to mean they would spend the whole weekend in their hotel room.
Katie gloomily turned back to the computer. It was looking as though she was going to spend the weekend surfing the Internet.
Katie was the youngest of five siblings, and the only one still in high school. At 18, she was extremely shy, which was probably why she had never had a boyfriend and kept a well-used vibrator under her bed. She was reasonably good-looking, with jet black hair that she kept tucked behind one ear, bright green eyes, and fair skin. Standing up to get a look at herself in the mirror, she looked her body up and down. Katie never played sports (she was uncoordinated at the best of times), but she had a naturally slim figure with 28C breasts. She was short, only five feet tall, something she never liked.
The closest sibling to Katie's age was her 19 year old brother Jake. Jake was only a few inches taller than Katie, but there was virtually no resemblance between them. Jake was the ladies man, and he often brought home hot girls. He had short blonde hair and blue eyes that girls loved. He was a long distance runner, and his lean body reflected that.
Katie's other three siblings were 22 year old triplets. Blonde with blue eyes, Julie, Alex and Mike looked almost identical, and they were closer than most siblings. Julie was a little bit curvy with large breasts while Alex had a body that women dreamed about. Mike was thin and gangly, but still attractive. Alex and Julie were so close, Katie sometimes wonder if they ever had sex.
Sighing, Katie reached under her bed to retrieve her vibrator. She had always been secretly attracted to all her siblings, and thinking about Julie and Mike had made her horny. She could already feel a moisture in her panties as she stripped off her clothes. Sitting in her computer chair with her legs spread wide, Katie clicked on a folder titled "English paper". Up popped a video of Sasha Gray getting fucked by an 8" cock while licking another girl's pussy. Slipping the vibrator along her dripping wet slit, Katie felt a surge of pleasure as the vibrator reached her clitoris. While not a lesbian, there was something about the sight of a girl eating out another girl that made Katie want to cum. As she let out a low moan, she heard the door open behind her.
Spinning the chair around in surprise, she was surprised to see her brother Jake standing in the doorway. His eyes started out at her face, then slowly moved down. Katie suddenly remembered she was completely naked, with her legs spread and her juices running down her thighs. She snapped her legs closed, and Jake turned bright red. Katie noticed a bulge beginning to grow in his pants.
"I-" Jake started to talk, then turned around and nearly sprinted out. Katie, who was also red, walked over and closed the door, then laid down on her bed and stared up at the ceiling. She was more embarrassed than she had ever been in her life, but also turned on. She fell asleep thinking about that bulge in Jake's pants.
When Katie woke up soon after, it was dark in her bedroom, and she could hear someone moving around. She laid there on her bed, too scared to move. When the light suddenly turned on, she saw her four siblings standing over her. She realized she was still naked, with her vibrator glistening with her pussy juice on the bed right next to her. When Katie tried to cover her once again soaking pussy and hard nipples up, Julie sat down on the bed and gently held her arms down.
"What are you doing?" Katie asked her older sister.