For my husband and I, we have chosen not to share this with our family and friends. A lot of people just can't wrap their mind around opening yourself to loving more than one person, they either see it as 'evil', wrong or playing with fire
We had two very different experiences with opening up to people: One was to my brother, who had/has a negative reaction to it and I wish we had not told him, out of necessity we did but looking back, I just wish we had made up an elaborate lie
It has put a slight distance between us. The second one, my husband's daughter, was much more understanding and curious and can see the benefits to such a relationship.
So, my husband and I have just decided that the people in our life don't really need to know. And I don't want to make someone uncomfortable around me, just for the sake of coming out and telling people something that they really don't need to know