Orunge

I'm new to this site and have never tried swinging or being with multiple partners. It has always intrigued me, however. Recently, my girlfriend brought the topic up again in bed. She asked me to talk dirty to her, which previously she had always been self-conscious about. I started saying some simple things about doing things to her, and if she liked it. Then she asked if I wanted an audience. Then she asked me to describe what the audience was doing to her as well. She said she envisioned more hands and mouths on her body, and even asked me, "Do you have any friends?" As this fantasy talk fueled a fun sexual episode. However, we have not ever discussed it outside of bed, and I am not really sure how to or whether I should. It turns me on when she gets assertive about her fantasies and desires like that, but part of me wonders if she is only saying it to rile me up. Anyway, not much experience here, but curious how any of you got started into the world of sharing, etc.