A/N: Well, this is a little different from what I normally write about but I really wanted to do a story or two with Billie in them so I figured I would. I had to adjust the timeline a little bit to fit my story but I think all of you Billie fans will hopefully like this.

Disclaimer: I don't own Charmed…blah blah blah…. You know the drill.

Summary: What happens when a sister kept a secret so big that it haunts the rest eighteen years later? This is something so big that it could change the Charmed One's lives forever. And what does Paige's new charge Billie have to do with it all?

Chapter One: Discovering The Truth

"Demons," Billie said irritably. "That's why I'm here, right? Not just to sit around and do nothing."

"I know that you're bored but there's nothing on the demonic radar," Paige said apologetically.

"Well, since I'm here and I have the stuff I need, can I borrow your bathroom?" she asked.

"For what?" Paige replied.

"Hair dye," Billie responded.

"What? You mean your hair's not naturally blonde?" Phoebe asked coming into the front room.

Billie shook her head. "Nope. I'm a brunette. Can't stand it though. It matches my eyes but I like the blonde better."

Phoebe briefly gazed into Billie's eyes and was hit with a familiar prang in the heart. What was that? Phoebe thought to herself. This was weird. "Did you inherit it from your mom?"

"I wouldn't know," Billie said.

"What do you mean by that?" Phoebe asked. "I thought you knew your mother."

"Yea, my adopted mother. When I turned eight, they told me that I was adopted and no one really knew who my birth mother was. I never knew my real mother."

"But you said that your sister-" Paige frowned as Billie cut her off.

"We grew up together. To me, she was my sister. That why I told you that my sister was kidnapped because that's what she was to me, my sister."

Something about this whole thing didn't sit quite right with Phoebe. "Go ahead. Just make sure you rinse out the sink or else Piper will throw a fit."

Billie nodded. She picked up the bag in which her dye was and went up the steps. Phoebe still had a troubled expression on her face, thinking.

"Something wrong?" Paige asked. "You look troubled."

"No, I was just thinking about something."

"What about?"

"Nothing for you to worry about. You just go and do what you need to do," Phoebe stood and turned to head up the stairs.

"Are you sure?" Paige asked.

"Positive."

"Good because I need to go shopping and get some stuff for Piper's birthday. I know we're not throwing her a big party or anything but I still want to get her something."

Phoebe nodded as she continued up the stairs. When she reached the top she heard Paige calling her goodbyes and shut the door. Phoebe was bothered by something in her past. Something that she couldn't just get over. How could she have been betrayed by one of the people who claimed to love her the most?

She closed the attic door behind her and crossed the room to the trunk in which the sister kept all of their magical and ritual necessities. She pulled out five white candles and placed them in a circle. She walked over to the Book of Shadows and flipped through a few pages and realized that she knew the spell she was going to use by heart. She closed her eyes, preparing herself for the upcoming confrontation.

"Hear these words hear this cry

Spirit from the other side

Come to me, I summon thee

Cross now the great divide"

Phoebe smiled as a ghostly form of her oldest sister appeared in the middle of the candles. Prue turned to see Phoebe. She stepped out of the circle, becoming tangible. She wrapped her arms around Phoebe. "Phoebe! I've missed you so much. How have you been? Where's Piper?"

"Something's never change," Phoebe muttered. "Piper's not here. I need to talk to you about what happened when you were fifteen. Prue, you told Grams that you got rid of it. Why did you lie? You told her that it wasn't going to be a problem. Well, guess what Prue? It is. It's a very big problem."

"Phoebe, it was a thing of my past. I never thought that it would come back to haunt me." she replied.

"Haunt you? You're haunting me. This whole thing is haunting me. What happens when Piper figures it out too? I should have known the moment I first saw it. It was uncanny. I… I'm just at a complete loss for words. How could you do it?" Phoebe stopped and thought. "Andy?"

Prue nodded. "What? You couldn't tell?" she said sarcastically. "Well, what are you going to do?"

"I'm going to have to say something. I can't just let this go on. The poor kid. I've so learned that absolutely nothing is coincidence in this family. You know you'll have to face it all sooner or later. You know that you'll be back here soon."

Again, Prue nodded. "I know but I just hope that I can be forgiven."

"But Prue, do you not realize how big this is? It's huge! This has affected our lives in more ways than you can imagine and it'll probably continue to affect our lives until the day we die. It's our responsibility now. We have to take care of this, she has to know. For now, you can go but I can promise you that she'll want to talk to you."

"Okay," Prue said. "It's only fair to her. I agree with you when you say she needs to know." She turned to leave when she turned back to Phoebe with a smirk. "What changed in you?"

"I guess having to be the middle sister. I give props to Piper. It's not as easy as she made it look." Phoebe smiled and gave a small wave as her sister vanished.

Phoebe heard a rustling noise outside of the door. When she opened it, she saw a jean leg vanish quickly around the corner. When she herself rounded the corner, she saw Billie vanish down the stairs. Phoebe rushed down the stairs, catching Billie just as she was headed out the door. "Wait!" she called. Billie turned to look at her, somewhat glaring at her.

"What?" she asked irritated.

"What did you hear?" Phoebe questioned.

"Enough. Is that what I though it was? Or rather, who I thought it was?" Phoebe avoided Billie's penetrating stare by looking sown at the floor. "Phoebe," Billie said softly. Her voice shook as she said the next sentence. "Was that my mom? My real mom?"

Phoebe met her eyes and nodded. "I'm so sorry you had to find out the way you did."

"How did you know who she was? Even I didn't know that. And why are there some pictures of her around the house? How…?"

"I knew because she… she…"

"She what? Phoebe, please just tell me the truth. I'm pleading you. I want to know. I need to know."

"She was my sister," Phoebe said slowly.

"Was? What happened to her?" Billie asked, incredulously.

"She was killed five years ago by a demon. His name was Shax. We quickly vanquished him afterward but we couldn't bring her back. That's how we met Paige."

"But if she was my mother, that means you're my…"

"Aunt," Phoebe finished. "Now it explains why we took to you so well and why there was an amazing bond between the four of us."

"But how could this happen?" she asked, utterly confused. "Is my dad still alive?"

Phoebe shook her head mournfully. "No, I'm sorry. He died about seven or eight years ago. Piper and I had always thought that Prue hadn't gone through with having you. We thought that she… she had an abortion. That's what our Grams told her to do and she told her that she did. And we believed her. I mean, I spent two and a half months mad at her because I thought that's what she had done. I couldn't forgive her. It was like killing another human being. Now after all these years, I just now find out that she had taken all of that resentment from me just so she could keep you a secret."

"Wow," Billie said quietly. "I never in my life thought that I find it out. I've always wondered if I could meet my mom and now I find out that she's dead. Looks like my dreams are shattered."

"Not necessarily," Phoebe quipped. "If you want to meet her, you still can. It's just another thing we do. We can contact the dead."

"You mean I can actually see her?" Billie asked, somewhat excited.

Phoebe nodded. "Do you want to go see her now?"

"Yea," Billie replied.

"C'mon then. Let's go up to the attic and we'll summon her. Then you two can talk." The two turned and headed up to the stairs. When they reached the attic, Phoebe re-lit the candles and had Billie come stand beside her at the Book of Shadows. Together, the read the spell.

"Hear our words, hear our cry

Spirit from the other side

We call to thee, we summon thee

Cross now the great divide."

Billie turned to Phoebe. "That felt good," she said. Phoebe smiled as Prue appeared once again in the middle of the candles. She looked around the room, her eyes finally resting on Billie. "Mom?" Billie asked softly.

"What!" came a loud voice from the doorway. Piper was home and that wasn't good.

"Piper, I can explain," Prue and Phoebe said together.

"You'd better. Both of you," Piper replied.

A/N: Well, there it is. I think it's a pretty cool twist and I hope all of you like it!