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."
"I've been know to give good massages" I replied.
"I know, I think I just got one," she laughed.
I lay back and couldn't stop thinking about doing naughty nasty things to my sister. If she was anything like Emily or Robyn, she must be dynamite in bed. I was jealous of John, wondering how he had fucked her last night. Wishing I had set up a camera to record them. I tucked that idea away in my "things to do list."
It was about this time when my thoughts wandered to where my roommate and those two little vixens had gone off too. I asked Megan if she wanted to find the rest of the crew and we decided to go exploring. I gathered the blanket and Frisbee and caught a quick glance at Megan's thong disappearing into her shorts again. She had also put her top back on without me seeing. Oh well, I thought, and we set out. We walked down a path that John and I often used to get to one of the many lakes in the park. The shade felt good, and after about 15 minutes of walking we could begin to see the lake through the trees.
I couldn't hear anyone and was about to turn around and try another path when I heard one of the girls moan in orgasm. I stopped and held my sister back so we could get a little closer without anyone noticing us. We crept through some brush and got a good view of the small beach that the path led to. What we saw was John on his knees behind Emily, who was on all fours getting slammed by John's rather thick hard cock. Both were completely naked, their clothes on the sand next to them. Robyn was lying on the sand watching the other two with lust in her eyes, she was rubbing her pussy through her bikini bottoms, her top off exposing her creamy breasts. Emily was wiggling her ass back toward John as he continued to fuck her hard and long.
Robyn then stood and took off her bottoms so she was naked and got on all fours in front of Emily spreading her ass cheeks wide. Emily buried her face in Robyn's ass and started licking and sucking her ass and pussy while moaning deeply with another orgasm. I looked at Megan who was already rubbing herself under her shorts; she looked at me and smiled whispering how hot the three of them looked. I stood behind Megan to give her a better view of the action in front of us, my hard-on rubbing against her ass through her shorts. She took off her shorts so she was just in a thong. I rubbed her ass cheeks while we watched Robyn began to moan in her first orgasm.
