She looked down at the illusion cast before her. Piper laid there, covered in her own blood beside a vision of Prue, as lovely in death as she had been in life. Leaning over her dying sister, she placed a hand over Piper's heart. "Slow the heart and ease the mind, heed this hope within this time, suspend death's presence from this house, preserve the body for future health," she said casting a spell to ensure that the Charmed line would continue. She kissed her sister's forehead, and cried for a moment before standing and receiving a swarm of white, shimmering lights that coalesced into her love. "I'm ready. Let's go." The two disappeared without leaving a trace, just in time for Leo, Phoebe and Cole to arrive and find Piper and Prue.
Prudence Halliwell had stolen away in broad daylight, magically covering her tracks so that she could never be found by her sisters or worse, the elders. Her mother, Patricia, and Grams had been the the first ones she had gone too when she discovered a dangerous secret. She was pregnant with a daughter, one that should never have been allowed to be conceived as she was of both light and dark. Prue had been desperate, scared and self-loathing. Her obligations as the eldest had lead to inability to have her own happiness. Rather, all of her desires had been placed on the back burner as she struggled to make sure that Piper and Phoebe would become the women they were supposed to be. Prue knew better than to let her jealousy get the better of her, but it had. Her marriage to a warlock may not have been her doing, but her fear and insecurities had left her vulnerable to the attack and she was left with an offspring whose existence threatened that of the charmed ones.
When she had gone to Patty and Penny, the two had shared a knowing look. While practically everyone knew it would be better if the child wasn't allowed to continue thriving in Prue's womb, none of the women could bring it upon themselves to suggest such a thing. All three knew what a precious thing a child was, and as Patty looked on at her daughter, she conceived her own plan to make sure that the past would not be repeated. Patty told her eldest daughter that she too had once conceived a child that was not allowed to be.
"We were afraid of reprisals," Patty said. "That you and your sisters would be denied your powers and God knows what would have been done to Paige. That's why we had, why we decided to place her up for adoption."
"This is your chance, Prudence." Prue turned to look at Grams. "What do you mean?"
"If you wish to be able to save your child you must leave your sisters. Your child will always be in trouble as long as you are under the surveillance of the Elders."
"I can't just leave Piper and Phoebe alone to protect themselves," Prue began to say in protest when her mother interrupted her.
"You won't have to," Patty said chiming in. "We, your Grams and I, can lead them to Paige and finally bring her home. She'll restore the power of three, and they'll remain protected by our heritage; giving you the opportunity to finally be allowed to lead your life for yourself." Patty stepped out of the circle of candles which Prue had lighted in order to summon them, making her corporeal. "The place your grandmother put you in, protector and mother to your sisters, was not your responsibility to bear. It was mine, and then it was hers. Nothing in this life has been fair to you; losing your parents, giving up your dreams. It should never have been demanded of you. Your sisters are independent, capable women because of you! They will protect each other as you have taught them. Your child, the one you hold beneath your heart, is now the one you must protect."
"Prudence, darling, there will come a day when you will need to answer to yourself about the life you have lead. Up until now, you haven't been responsible for the majority of the sorrows you have endured. But this is of your own accord, and only you can bear the consequences. You must decide; your sisters,or the child?"
And so they had conspired, meeting in secret and making sure to cloak their plans so that they couldn't be traced back to Prue. She had glamoured into the Sources Seer and planted information about a "Dr. Griffiths" who was meant to do some "great act of good". In reality, Dr. Griffiths was a golem, one Prue had carefully constructed so that even her sisters had been unable to detect his less than human origins. The manipulation had been unbearable at first, as she silently said goodbye to her sisters every time she saw them. But as the attack occurred, Prue felt a weight lifted off her shoulders. She kept death at bay for Piper, giving Phoebe and Leo the time to come back and save her.
As Prue completed her task, she was met by her soulmate, Andrew Trudeau. "Are you ready?"
"I have to be," she murmured softly. "Thank you, for helping me."
"I'd do anything for you," he said, wrapping his arms around her as their bodies evaporated into tiny molecules that floated higher into the atmosphere, spiriting Prue and her child away.