Welcome to the forums!
We often read here that co-habitation is a difficult step. (One that I, personally, tend to take on way faster than is generally recommended...like immediately).
I am curious as to how the cohabitation is working out for you and your sleeping arrangements (another hot topic on here at times - we sleep three to a king-size bed, but there are no kids in our mix - I'm sure others here would be interested in knowing the ages of you kids and your plans for introducing them to the dynamics of your situation).
Me: poly bi female, in an "open-but-not-looking" Vee-plus with -
MrS: hetero polyflexible male, live-in husband (23+ yrs)
Dude: hetero poly male, live-in boyfriend (4+ yrs) and MrS's best friend
Lotus: poly bi married female, "it's complicated" relationships with Dude/JaneQ/MrS (1+ years)
+ "others" = FBs, FWBs, lover-friends, platonic G/BFs, boytoys, etc.
My poly blogs here:
The Journey of JaneQSmythe
The Notebook of JaneQSmythe