Not at all ...
I mean you are like 2meters away from each other. :-/
One dont need tadpole to hear two people talking about that ...
ESPECIALY, if they are interested in Tav themselves, so we can expect them to at least watch you if nothing else ... also even if you dont hear every word, i dare to presume that language of a body should provide enough information for our observer that those two are up to someting ...

(Please dont tell me i was the only one who was thinking about "that beautifull girl on prom" ... and then seen her giggle while talking to someone else ... and just thought "oh shit".

)
Second part that many people mentions, its "aproval system" ... that is happening right when you make some choice, even tho your companion was in the party when you choose that ...
Personaly i liked that, since people talk ... no matter what you will do, you can bet that sooner or later your "curently inactive" companions should know ... and its simply easier for everyone, if they know and react imediatly ... than if you would get "Gale Disagree" in random time few days after.

(otherwise just another odd scenario happened, when companion that is waiting in camp is blessed by godlike ignoracy about your actions ... you could burn orphanage, and still be seen as Goldstar in eyes of your permanently inactive Paladin ... thats just dumb)