After everyone showered and got cleaned up from last night's activities we decided to head out to the state park that surrounds our school, maybe hike and swim since it was beginning to get hot out. We all jumped in my car and soon we were off cruising down the highway. John and I were just chilling in shorts and t-shirts; the girls were in bikini tops and shorts. It was a nice view in the rearview mirror to see 3 sets of cleavage in the back seat.
We got to the park, found a secluded field surrounded by trees and laid out a blanket. The day was hot, but not too humid. I broke out a Frisbee and John, Megan and I began to throw it around. Emily and Robyn both lay on the blanket, I noticed they had undone their bikini straps and were laying face down trying to get a little sun. After a good half hour of running for Frisbees that flew over my head I decided to sit down. Emily and Robyn decided to go exploring and John decided to tag along, he knew the forest well so he'd be a good guide. Megan and I decided to sun for a bit so I watched a very happy John leaving with the girls.
Megan and I lay out and she asked if I could rub some oil on her back. I happily obliged, pouring the oil on my hands and rubbing them together, I gently rubbed her fair skinned shoulders and back.
"Hold on, I don't want a tan line." She said.
She removed her strap holding her perky tits in and tossed her top to the side, I got a good peek at her rack from the side, as she lay back down on her tummy.
"That's better, thanks bro." She giggled, looking at me out of the corner of her eye.
"No problem sis," I smiled. "I don't mind it at all."
I rubbed her from her shoulders down to her shorts, she then raised her hips and slid the shorts down to reveal a gorgeous ass barely covered by black thong to match her top.
"Get me all over please, I don't want to burn." She said.
I continued to rub the oil down to her small of her back and over the perfect ass cheeks. I made sure to get every nook and cranny, and then continued down her thighs and calves. I couldn't believe how tight her leg and ass muscles were, those hours doing laps in the pool certainly had paid off. After lingering as long as I could I finally sat back and admired my sister's form as she lay there.
"Thank you Tommy" she giggled, she was the only one who called me Tommy, and most people called me Tom or Thomas. " You have good strong hands."