I slid the glass pane open as she turned to leave. “Can I help you?,” I asked. Lisa twirled back towards me and her straight raven hair swished ov...r from one shoulder to the next. Making direct eye contact with me, obviously trying not to look down at my white streaked jeans, she embarrassingly stuttered, “Oh, geesh, um, I just came by to borrow some sugar. I need two cups for a batch of cookies I’m making. God, do people even ask their neighbors for stuff like that anymore? I’m sorry, I’ll. Here, let's try a little experiment." She handed me my glass of water. "Gargle with this."After I did as I was told, she said, "Try saying something from the spot in your throat where you just gargled." When I did, my voice came out higher, softer and almost natural. "Very good, Anne. That's your new voice." Thanks," I said shyly."What are you going to order?" Donna asked."I'm famished," I said, getting a feel for my new voice. "A double order of chili sounds good." Not if you want to maintain. No, that made this more exciting. I tugged down her pants then her white panties. I ripped those off hard and exposed that gorgeous ass and her shaved pussy.Juices beaded on them. She was soaked. I wanted to eat her, but...We didn't have that long. We were on a break. “Shit,” I groaned and lined my cock at my sister's pussy. She looked over her shoulder, this wild delight burning in her eyes. She wiggled that ass, begging me to slide into her and fuck her hard. I was so ready for it.I pressed. I should have guessed that Aimee would come prepared and I remember thinking how fortunate it was that we were the only campers on the site that night.“Hey!” Aimee called to Sami and Charlie causing them to pause the sixty-nine they were engaged in, “Try this.” She tossed the dildo to them. Eighteen inches of thick purple silicone flew across the tent hitting Charlie square on the ass.“We love these things,” giggled Sami as she grabbed it and started to rub it against her slick pussy, smearing.