User blog comment:Merlaa/Do you think Morgana knows?/@comment-5845325-20121223024342

No, however I do believe she is aware of the vengeance that Mordred feels towards Arthur and that he will kill him. She is overlooking the battle, not actually fighting one vs. one. She is not aware of a lot, so my best guess is that she assumes Mordred will kill him since he is on the battle field.