Which is kind of like saying that if an animal has stripes, it must be a zebra.
All Zebras are animals, so all animals must be zebras!
Anyway, I'm up to about page 100 of this book, so far so good. I haven't gotten to see yet all of T'ryssa's antics yet, her "interview" was interesting though.
And as for the part still on the Rhea, I too (at first) took that exchange to mean there was some sort of affair going on with her commanding officer. Though as the story progresses and you get to know Trys it becomes more clear that she just has that type of personality. The type where to the untrained eye it appears she's overly flirty with most people, but in reality it's innocent friendly/playfulness.