Should my wife and I have a Ménage à trois

My wife and I are high school sweet hearts. We're been together for nine years and have been married for one year. Over the course of the last few months we've causally discussed about having a three some. We're both very honest and open with each other and would like to explore more our sexuality since we were each others first everything. First kiss, first real relationship, first sexual encounter, and everything in between.

When ever we talk about having a three some we get excited about it but laugh it off saying it probably will never happen because we're both insanely jealous. We both hate the idea of sharing each other but love the idea of fulfilling each others fantasies.

Has anyone been through a similar situation with your SO? If so did you have a solution or did it destroyed your relationship?