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.
When the ruckus settled down, I looked back to where Karen was. She had taken off her robe, and was lying down on the chair. She was wearing a modest two-piece bathing suit. She'd told me once that she couldn't wear a one-piece, because the top would never fit her. If she bought one that fit her up top, it would hang off the rest of her body. She'd found a two-piece that had ruffles around the top, so it partially disguised her breasts.
She showed no sign of having heard us. She had her nose buried in a book.
I figured that she was waiting for us to clear out so that she could have the pool to herself and do a little swimming. I wanted to help, and I didn't want to hear any more shit about her, so I suggested to the other guys that we head on over to the park to play some hoops.
*****
The whole time we were at the park the other guys kept after me about my sister. What was it like to live with a hot babe? What was her bra size? Did I ever see her naked? Did she date a lot of different guys? Could I hook them up? I was getting really pissed, they knew it, and that egged them on. Finally I couldn't take it anymore and I left.
When I got back from the park I went out back for one last dip in the pool, and Karen was in the water. As I waded in, she swam over to me to say "Hi".
"Um... Sis, I hope we weren't making too much noise for you to read."
"You mean, did I hear what they were saying about me? I did, but I'm used to it. I don't give a shit what they think. It's sweet of you to care, though. You always do. Thanks for being such a good brother."
At this point she was standing waist deep in the water right in front of me, almost touching me. No excuses, I just couldn't help looking at her chest. From my angle the ruffles didn't hide anything. I was looking down into the most amazing cleavage I'd ever seen in real life. I caught myself, and looked up. She raised one eyebrow, leaned forward, and kissed me on the cheek.