Transference is like the iceberg the Titanic hit. Only part of it is visible. The parts that are not visible are the 'negstive' aspects or the aspects we've been afraid off. I should imagine T is aware of what's been going on in the room. We act it out before we even talk about it.
But I don't know what type of therapy you are.
a skilled T will welcome any discussion on anything. The beauty of therapy