Give My Sister an Orgasm

My wife Stacy and her sister Carrie get together once a month to drink wine and catch up on things. They rarely talk sex, but tonight orgasms were the topic. Stacy talked about how she hadn't had an orgasm until she met me. And that she thought she was until I asked her why she never wanted to cum. Carrie asked some questions and Stacy explained that she didn't orgasm from intercourse, but had orgasms when I stimulated her g-spot and licked her clit. Carrie began to cry. She said that her husband Scott didn't like to give or receive oral and was sure that she had never had an orgasm. Stacy offered to get a vibrator for Carrie, but she said that seemed too impersonal. Stacy shrugged and called me. "Honey, I've had too much to drink, could you please come and pick me up?" Unaware of what I was getting into, I drove over. Once inside, I could see that they were both sauced. "Michael, my love," Stacy said drunkenly. "I need you to give my sister an orgasm." She told me about the evening's conversation and how grateful she was to be having orgasms. I asked about Scott. They said this was a one time deal and that Scott must never know. "And besides," said Stacy, "it's not like you're going to fuck her. You're just going to give her an orgasm." Carrie led me to the bedroom, took off her pants and panties, laid down and spread her legs. "I'm ready," she said hopefully. "Don't try to cum," I cautioned as I wet my fingers. "Just let it happen." I slid two fingers into Carrie's very wet pussy, rubbed her g-spot and began licking her clitoris. Almost immediately, Carrie began moaning. I varied the pressure and pace, brought her to the edge and let her back down. "Oh my god, Michael, don't tease me." I started back in earnest. Carrie was moaning "Oh my god" and then just exploded. I teased Carrie's clit until she couldn't take it any longer. Carrie stayed on the bed while Stacy and I let ourselves out. "Thank you," Stacy said. "She needed that." Two days later Carrie called me. "Michael, could you come over... and don't tell Stacy."