Please read the previous chapters.
Karen, at the start of chapter 1, had just turned 18; her brother Dave was 20.
*
My sister had a great ass.
My friends certainly thought so. I already told you how Pete had noticed she had big breasts, but there was more to come.
We were fortunate enough to live in an area where the swimming season was nine months, so even though it was nearing Thanksgiving our pool was comfortable. My friends and I used to spend weekend afternoons in the pool, or just hanging around it.
One afternoon four of us were in the water, having chicken fights, when my sister came out of the house. I was a little surprised, because she almost never came out when there were guys around. I now knew that it was because she was embarrassed about them seeing her body.
She usually didn't spend much time outdoors anyways. You know that our last name is Olivera, and I take after my father when it comes to olive skin, black hair, and sun resistance. To see her, you'd never think that Karen and I were related: she got her fair skin, green eyes, and auburn hair from Mom (maiden name McKinney). My father had built a roof over part of the patio near the pool, so that Karen and Mom could sit out without worrying about burning. That's where Karen headed.
She was wearing a loose robe, but as she bent over to arrange a lounger the robe pulled tight across her butt for a moment. Pete and the other guys must have been staring at her already, because they certainly noticed in an instant. It only took a moment for them to agree that my sister had a great ass.
"Boy, I'd like to bend her over like that again," Ben said with a snicker. I would have kicked him, except I was on the bottom and he was sitting on my shoulders.
"Me, too."
"Damn, yeah."
"Where you been hidin' that piece of ass, Dave?"
"Hey, I hear she's some kind of genius. Do you think she'd do any tutoring? I could really use some help with my problem."
They were talking softly, but I was still afraid my sister would hear them.
"Shut up, you pricks, she'll hear you!"
"I hope she does" said Ben, and this time I bucked him off my shoulders and held his head under water.