She came back with the beers and handed me the chain again. "Won't you lead me back to the tents, now?" she asked, while giving me that look I've come...to know so well. My buddy shrugged, and already accepted his loss, when I thought of something else. "We'll lead you back and give you what you need" I said. A faint smile lighted up on her face. "We?"And so the three of us walked back to the tents, opened up the largest one and lay her down. Greg didn't lose any time and put on a condom. And. She grabbed two beers and headed out to the patio. "You coming? She asked. I followed and took my beer. She had the hot tub going, walked to the edge and dropped her towel, revealing her black bikini, the kind that ties (or unites) everywhere. "Feel free to join me."she said as she climbed in. "I'm not wearing a bathing suit." "That's ok, your boxers will be fine." "Um... I don't wear underwear." A smile gleaned across her face. "That's ok, not like I haven't seen it before. Ok look I'll turn. She didn’t stop me, so I tried to move her panty down but not able slid it down. But she took clue from my move and raised her ass little so that I can slide her panty down. Now her big ass was open to me. Wow!! I can’t believe myself; my sister was lying beside me with her lower and panty down till her thigh. I was on cloud nine, I started to finger her.As this was the first time to touch her bare skin, I went slowly. I first touched her whole ass, then ass crack, then pubic area then the. To pound my ass into tomorrow. She held on for one last slow thrust, and then fucked me like crazy! I was screaming with ecstasy. Every thrust the head of her cock would hit my prostate, causing my eyes to roll. This is what heaven feels like!Every now and then I would try to stroke my cock, but as I did, I felt myself about to explode, so I would have to pull right back. After a while of fucking like this, she pulled out to take a breath and tell me to get on my back. She wanted to fuck me.