"Hey, Mom. Bob and I are gonna go for a swim."
"OK. Be back in time for supper."
We eat at 5, so that gave us 3 hours.
My sister, Emily, looked wonderful in her bathing suit. It was a black silk bikini.
I LOVED it when she wore this suit because when it was wet it clung to her bouncy ass and her nipples were pressed against the material. I tried desperately to conceal my hard-on, but I think she suspects something.
We got in the car and drove 15 minutes to the beach. Placing a blanket on the sand, my sis and I made our own picnic area.
"Well, I'm dreadfully hot. I'm taking a swim."
"Me too." I decided to stay behind my 20 year old sis so I can watch her ass giggle as she walked. People saw what I was doing and just huffed at me. Little did they know the young woman was my sibling.
Emily swam out until she was up to her stomach and dove right in. "SHIT! That's COLD." She proclaimed.
It was quite cold. But I was focusing on her lovely butt. I went underwater and got a better view of it. Thank goodness my sister wasn't paying attention. I boldly started swimming and "accidentally" brushed up against her soft flesh.
"YEAH."
"Sorry about that." I lied, when I got up for air.
She just snorted. "Accidents do happen."
You see, my beautiful sister(with shoulder-length brunette hair)and I have been fucking for months now, so touching her was no biggie.