Welcome to our forum.
It sounds like responsible non-monogamy has been meant to be for you for a long time. It is wonderful that your wife has been supportive about this.
We have many resources you can tap into on this site, so dig right in. Follow any threads you find interesting, and post any thoughts or questions that come to your mind.
Hope you'll enjoy your stay.
Love means never having to say, "Put down that meat cleaver!"