I think a relationship means something different to everyone. I know with my ex it was a monogamous relationship, as it was what she wanted, and I had no issue with it. Now, I think it is more based in emotion. And yes, I do like the idea of having a title to it, and an understanding between all involved, but part of what drew me to Antoinette and Tricia, and now you, are how open and caring you are. I wouldn't want to put an end to who you are. I do not need monogamy to feel secure, just trust and honesty of emotion.
As for the changing colors... Why not think of the other day when you were under the table between my legs. Remember how I touched you, how I tasted... everything about it. See if the flowers change color again.