It had been another blistering hot day and the evening wasn't any different. Though the sun had gone down, the humidity was still a killer. Julia was in her room with all the windows open and the fan on. She was listening to the latest Reel Big Fish album, which she got for her 18th birthday and was dancing along with it. Her parents had gone out and she was home alone with her sister Rebecca. Rebecca was the quieter and more mature one of the two, even though she was only a year older. Both sisters were often mistaken for twins because they looked so much alike. They both had straight blonde hair that reached half way down their backs. Crystal blue eyes and very tanned skin. The only difference was that Rebecca was a few inches taller standing 5'6, while Julia was 5'4.
Rebecca walked down the hall to her sister's room. She pushed open the door slightly. The music came blasting out. Julia didn't hear her sister and kept on dancing. Rebecca didn't say anything and paused watching her sister. Julia danced around her room wearing a very tight baby-blue tank top and white cotton panties. Rebecca had seen her sister wearing very little before, but this time she saw some thing more. She found her sister was incredibly sexy. Rebecca's eyes followed Julia perky firm breast as they bounced up and down while she danced. They followed her round slender ass as Julia unknowingly wiggled it at Rebecca. Rebecca felt her own panties getting damp. She quietly closed the door and returned to her room.
Rebecca tucked herself under the covers and turned off the light, going to bed.
It was still early and she wasn't very tired but she had to get up early the next day.
Rebecca tossed and turned for 4 hours. It was close to 1 AM and she was still wide- awake. Their parents had gotten home a couple of hours ago and after telling Julia to turn off the music and go to bed, they did the same, but the heat was too much for Rebecca. That and she had thoughts of her sister dancing in her head. Her panties, the only clothes she wore, were damp. She decided to get up and get a drink to cool off. She walked across the hall to the bathroom and stared at herself in the mirror. In the reflection she saw the bathtub. A cold shower might do her some good in more ways than one, she thought. But no, what if her mom walked in, than what would she tell her. The A/C was on high and the rest of the house was cool. So the decision was made. No shower. She gulped down two glasses of cold water, turned off the light and went back to her room. On the way she heard a noise. It was from her sister's room.
She walked towards Julia's room. The noise became slightly louder and Rebecca could hear the hum of a small machine. Julia's door was open slightly enough that Rebecca could look in. She peaked in around the corner to see Julia naked lying on her back. Her legs were spread apart with the covers kicked to the end of the bed. Rebecca saw she was holding something, one hand above her pubic hair, the other cupping her breast quite firmly. What ever she was holding was making the humming noise. Julia's hips moved slowly on the bed and she let out small sighs of pleasure under closed eyes. Rebecca found her hands cupping her naked breasts and pinching her nipples hard. She felt the heat grow inside her own body and panties becoming wetter. From her arms moving, she hit Julia's door it creaked open a little more and both girls gasped at the same time. Rebecca was frozen still.
"Rebecca?" Julia whispered. "Is that you?"
"Um hmm." Rebecca replied.
"It's okay. You can come in." Rebecca hesitated a moment than pushed the door open. "Close it totally." Julia said. Rebecca did as she was told. She turned and saw Julia naked in front of her. Julia had closed her legs and put whatever she was holding behind her. She lay on her bed with both legs to the side. "You okay?" Julia asked.
"I'm sorry. I shouldn't have been spying like that."
"What did you see?" Julia asked. Rebecca sat on the bed beside her sister.
"You were holding something… down there." Julia giggled. "What's so funny?"
"Did you like what you saw?" Julia asked. "I think you did." Julia looked at Rebecca's hard nipples and panties. The wettest had crawled up the front of them a bit.
"Yes." She sounded ashamed.
"Hey, don't be like that." She touched her arm. "It's okay really."
"I have a confession. I was watching you earlier too. When you were dancing. You just looked so …sexy."
"Thank you." Julia said.
"I've never been with another girl before."
