That was the gist of what she told her audience in the room.
Of course, she didn't explain something on purpose.
For example, she didn't mention that when the emperor guaranteed her safety, it was her safety only as his 'hostage'. She failed to mention it was actually the last moment in her life when she discovered Ober's treason. She also didn't say the reason she jumped into the fire at the risk of her life was because she couldn't ignore what was going to happen since she returned from death.
Except for these three points, she frankly confessed the whole situation without exaggerating it or abridging. Although her story was not perfect, it was enough to convince them.
Mrs. Charlotte was only slightly surprised when she first heard of the word 'treason.' Since then, she listened to the duke's daughter all along with a gentle expression on her face.