My girl friend (GF), formerly a shy, reserved, and conservative Asian gal, completely transformed into a hot, sexual, dynamo within several months after we started swinging. We had been dating about a month, and while we had done a lot of kissing, nipple sucking, me giving her oral, and her stroking my cock, we had not had full penetration sex yet. During a visit to New York City we passed a swing club on the way to a Broadway show, and after seeing the marque she asked what it was. When I told her it was a swing club and what went on there, she said, "Sounds like fun. Let's go after the show. (Important note, it was her idea, not mine!)
We agreed that at the swing club we would have soft swap only, no penetration. Lying nude on our towels in the large group room, she covered us with a towel and kept telling me, "Don't point or speak out, they might notice us.", as the couples around were having sex. We had soft play with two couples that night, but talked about the excitement of it for two weeks, when we went back to the club.
The second time at the club started with the same agreed upon rules, soft swap only, no penetration. But, within thirty minutes of being nude, on our towels in the group room, we met a couple that we liked. Soon I was giving the gal multiple orgasms with my tongue her clit, and my GF and the guy were alternating between her sucking his cock and he sucking her clit. Finally, his gal said she was exhausted and we moved onto each side of my gal, watching him get up again to go change his cum filled condom in the bathroom. When he came back, after putting on a new condom, he went down on her again. After about five minutes, he got onto his knee between her legs, hard cock in his hand, and asked, "May I fuck you?"
She looked up at me and raised her eyebrows as if to ask me if it was OK. A thousand thoughts went through my head in a microsecond, including, "Oh shit, I have not even fucked her yet!" But, I really liked her and wanted her to have the full experience if she wanted it. So, I nodded my head, "Yes." She pulled him toward her and he slipped his hard, condom covered cock deep into her slick, juicy pussy. He was only able to take about ten strokes before he came. He apologized for cumming so quick, telling her that it was because she was so tight. He got up and went to the bathroom again to change his condom.
The three of us talked a bit while he was gone. His gal asked how was it, and my GF said, "Awesome!" She then kissed me, thanked me, and said that she would make it up to me later. When he returned, they had another round of sex, this time lasting about 30 minutes. This time, his gal and I took turns kissing my GF and sucking my GF's tits. After he came, we chatted for a while and then they left. We left soon afterwards.
Back at the hotel, my GF and I had our first round of fantastic sex, and he was right, she was very tight. Even though she was 33, she was a petite Asian and has never had children.
That night set us off, and she turned into swinging tiger. At first we visited that and other swing clubs and attended some swing parties. But after about a year we settled down to hasting a small swing party with another couple and up to four single guys about every three weeks. We found out that she preferred to have three guys with her, one sucking each nipple and the third sucking her clit or fucking her. She also likes to French kiss the guy who is fucking her. Before long she was pegging any of the guys who were interested and learned that she liked anal. Oh, and she loves to have someone under her 69 sucking her clit while a guy is fucking her doggie. After swinging for about two years she had her first really big (9X6 inch) cock and loved it. We had found that if she has an orgasm first, she can take large cocks with ease. Six months later she had her first BBC, and since then she has been a size queen.
Even after ten years of swinging and fucking many large cocks, she is still very tight. After each swing session, we try to always have our own round of sweet sex. Even though we have all the guys wear condoms, she juices so much that our round of sex is like hot, sloppy seconds, and I love it!
Our recommendation is take it slow and let swinging be her idea if possible. Good luck!