Polyamorous?

My husband and I want to bring a girl into our relationship. Not just for a sexual threesome, but as an actual relationship that includes all three of us. Dating, hanging out, enjoying time with, etc.

Has anyone tried this and had success?

We've already talked about boundaries and rules and made sure we both understand what we're getting into.

Where would we find a female that would be interested in this?

Tell your stories on situations like this!