Morgan basically raped Artoria, and that was thanks to Merlin giving her the excalibur of flesh. But it is canon, and that´s how Mordred was born. I´m pretty sure it was mentioned in the visual novel in either the Fate Route or Heavens Feels.
Like my past self said 2 years ago, that is considered dark lore within Fate.
Where did you find it written? Has it been told in the original visual novel that Merlin gave Saber a penis, or in one of the spin-off novels?
