I would tend to agree with you, Quila - my monogamous partner would never ever self-identify as polyamorous or polyfidelitous (is that the right word?) but we are in a non-exclusive relationship. When I have tried to use the term poly to described our relationship she has been very strongly against that.
I think that what you wrote there does a great job of describing my reality, and has helped me sort something out that had been bugging me.
So thank you!
"Listen, or your tongue will make you deaf." - Native American Proverb