Morgana's retelling was pulled from one of her earliest memories. This was shortly before 'she' returned for the first time, during the time period when they were led by Typhon and Ophelia.
Morgana could even recall what she was doing at the time. She, Ophelia, and Artemis had been sleeping in the cave along with several other nestlings, when Ophelia suddenly woke up with a jolt.
At the time, Ophelia had been experiencing some intense nightmares that often left her dazed and confused, but whenever this happened, she would always go to find Typhon.
On this occasion, Morgana thought it was simply another one of them and went back to sleep. Yet, although Typhon was in the cave with them, Ophelia didn't go to meet him, climbing up the cave and out into the forest instead.
Morgana was surprised by this and got up to follow her – the forest they lived in was very dangerous for a serpent alone and she wanted to protect her.