After the second giant war, Hera was forced, as a punishment, to correct Leo and Piper's memories from before they met Jason.
Piper was at first reluctant to agree because she felt like she wanted to feel like Jason had been there for longer even if she knew that it was all false.
Jason and Leo persuaded her to agree because it would be a lot of help for her to know the truth about her past without Jason and she and Jason would have the chance to have a better and healthier relationship that way.
She finally agreed.
Leo and Piper were summoned to Olympus and Hera was waiting for them, supervised by Zeus. Hera lifted the enchantments and effects of the mist from them and at last they knew the truth.
At first nothing happened, and they were both confused but then they both felt a sudden drowsiness and felt their eyelids grow really heavy.
The Goddess acted like it was an everyday thing that happened so they ignored the kids and started a different conversation...something about Apollo?
They didn't have a chance to hear anything else before they both plunged into what then seemed like a very deep sleep.
Back at camp:
Piper was lying restlessly on her bed in the Aphrodite cabin. Her siblings were all asleep, but she was gazing unblinkingly at the dark ceiling.
Her mind was a jumble of events that seemed to play over eachother, intrerrupting and restarting at random moments.
She tried to put them all in order, at least find a logical sequence. But she was too full of energy to lay down.
She stood up and threw on a hoodie over her pyjamas and walked quickly but noiselessly through the dark cabin, avoiding waking her siblings up.
She stepped out in to the cool breeze of the night and stood in the open doorway, staring at the crescent moon with a lopsided stare, making the moon look like a smiling set of teeth.
In the distance she heard the sounds of various beasts and creatures that roamed the forest at night, but her inward terror made her surprisingly calm on the outside.
She stole a quick glance at the Hepheastus cabin, the looked away almost immediately, as if Leo could see her expressions through the walls.
She took several deep breaths and then aat down and rested her head on the wall or her cabin, next to a pot of red tulips.
She started from the beginning.