It sound like things are going wonderfully for you all, and it also sounds like you're handling everything in a very same manner, kudos! In case you haven't seen it, this site and this page in particular are great: www.morethantwo.com/coupledating.html
Best of luck!
The major players. Me, 30ish bi female. Gia, girlfriend of 4+ years. Clay, boyfriend/dom. Davis, ex/friend/"it's complicated." Eddie, roommate & fwb.
The supporting cast. Eric, Gia's husband. Bee, Gia and Eric's toddler. Dexter, Gia's lover. Helen, Eric's lover. Izzy and Nikki, Clay's partners. Liam, Eddie's husband.