That sounds like a very good arrangement that works for all 3 (4) of you. We did originally all 3 sleep in our kind size bed the first year or two when my wife's boyfriend would visit (which was usually 2-4 weeks at a time), which worked ok for awhile, but we all decided him having his own space as well when he visited, seemed to work much better.
The characters in another chapter we call life!
T - Wife - Poly
J - Husband Poly