Rather than panicking, the heir intended to downplay the whole thing. Even if she just said a few lines, it would be enough and hopefully no one would notice that she was too afraid to speak up. No one listened to boring speeches anyways, they just appeared that way while wondering what the speaker would look like in a reveling costume.
Not that the speaker was better, they just rambled on while wondering what their audience would look like in just their underwear.
That aside the noble heir was in her special disguised carriage traveled smoothly, advance shocks and smooth roads a blessing unknown to the world.