William

A/N: Here it is. One of my favorite chapters to put together. Hope you enjoy.

Disclaimer: I own Darcy and Olivia. That is all. Just those two.

Darcy walked through her room getting stuff together before she headed to work. She went to go put her phone in her bag when it rang. Carter's name flashed across the screen. She hadn't spoken to him since he told her about her dad.

"What?!" she asked not really wanting to talk to him if it was gonna be the same thing.

"Why so hostel sis?" he said.

"Because every time I hear from you it's the same news and well I'm a bit over it."

"And I'm sorry but..."

"New news before my father tells me everything?"

"He's telling you everything?"

"Once he gets home, yeah. Which should be any day now."

"Do you want answers faster?"

"How?"

"Well I may have a way to test my verdict on your dad"

"Seriously how?"
"I'll call you back I'm meeting Serena"

"Oh okay" she said and hung up and a text came in.

BASS: I know you're still mad but will you please help me plan Dorotta's wedding. I'm trying to win Blair back.

She gave a fake smile and through her phone in her bag and headed toward the Waldorf's. She got there and walked in the middle of Nate and Chuck's conversation.

"Sure but Blair didn't know that when she went to Jack. I guess she left that part out" Chuck said "I can feel your brain strain Nathaniel. I don't expect you to understand"

"What's that supposed to mean?" Nate said.

"You and Serena have it easy, until now your biggest concern is whose hair is shinier. Did she tell you where she was this morning?"

Darcy knew that answer.

"She went to breakfast with the Humphreys what does it matter?"

"Did she tell you Carter is in town?" Darcy asked and they both turned to her "because he is."

"I was just about to ask that?" Chuck replied looking at her.

"Do you happen to know where he is staying?" she asked him knowing very well Chuck Bass knew where Carter Baizen would be staying.

"St. Regis" Chuck said confused.

"That Roof top discussion. My thing about the thing" she said and he nodded. Nate looked at them both confused.

"You two have no idea what you're talking about" Nate replied.

"You're my best friend Nate but he told me this morning on the phone he was meeting her." Darcy said.

"If you'll excuse me I was headed out." Nate said leaving.

"So he has more info?" Chuck asked her after Nate left.

"I'll fill you in later once I get more info."

"Deal" he replied.

"So what do you need me to do boss" she smiled.

"Be honest, do you think this will work? Getting Blair back?"

"She does like weddings" she smiled. "You care about her Bass so if this is what you need to do to get her. Then fight like hell."

"I wish you would have fought hard for Nate. You two at least had an honest relationship."

She smiled at him.

"I'm gonna go check on that hotel we run. Keep my mind off of him and Carter and my family drama" she said and he kissed her cheek.

"See you at the wedding tomorrow?"

"Definitely" she said and walked out.

*Carter and Nate*

Carter walked up to the Waldorf building seeing Nate.

"Nate Archibald"

"What are you doing here Baizen?"
"Oh I'm just dropping off something for Serena."

"How about you stay away from my girlfriend"

"Right you two are a thing now. Sucks that you Darcy broke up. She really liked you. You made her happy."

"What do you want from Serena?"

"She's the one that wanted something, both her and your ex. And it looks like I'm the only one who can." Carter said "And I'm guessing neither one has shared what it is they asked me for. I gotta run so if you need anything I'll be at the St. Regis but Serena already knows that."

Carter handed him something and walked off.

After checking on the hotel and doing her duties she headed home. She called Carter to find that info but no answer. Which was driving her crazy. She headed over to the pre wedding party. She ended up dancing with some Russian stranger and laughing with him. After their balloon popped she walked away and spotted Nate.

"Hey Best friend" she replied.

"Hey" he said.

"You and Serena fighting?"

"Carter."

"Yeah, I know" she replied.

"Do you know what she needs him for?"

"Nate, if I could tell you I would but it's not my business."

"Then what do you have him looking into?"

"My dad. I think he's hiding something. Big"

"Wow"

"I wanted to tell you Nate. When we were together. I just needed it to be a 'me' thing. I didn't want to make a big deal out of it. Until I had to. And I really was hoping it would be nothing."

"Oh."

"Maybe Serena's thing is the same."

"Darcy I get why you used Carter. He's your family sort of but why did Serena ask him?"

"That's a question for her" she said.

"I shouldn't make a big deal out of it though right? I mean I talk to you and you're my ex and so is Vanessa and Blair"

"Exactly" she smiled. "You wanna re try that balloon thing with me?"

"Next wedding" he joked.

"Oh you're on Archibald" she joked glad she could laugh with her best friend again.

The next morning she woke up to a text.

Carter: See you at wed. I have a plan

She walked into the venue running into Nate and Serena.

"Hey" she said realizing she interrupted a serious conversation "Um I'll just come back"

"No D, stay. We were done" Serena said and Nate left upset. She gave him a faint smile as he walked by her.

"Just the two ladies I wanted to see" Carter said coming in.

"I just got your text what are you doing here?"

"I may know where your dad is" he said.

"Where?"

"It's like a 3 hour plane ride from here. You guys ready for this"

"Why am I here?" Darcy said not really wanting him to answer..

"You're coming with" he said raising an eyebrow.

"I am?"

"Please D, he's right. I need you. I love you like a sister" Serena said which caused Carter to smirk.

Darcy looked at Carter and back to Serena.

"Alright" she said "let's go"

They got out into the car and were headed to the airport when they realized that the plane ticket was purchased a week ago.

"Carter. Why is this ticket dated a week ago?" Serena asked. "How long have you known he's been in Palm Beach?"

"Palm Beach?" Darcy asked. "Your dad is in Palm Beach"

Of course he was she thought. Her dad had an apartment in Palm Beach. They kicked Carter out of the limo and went on their way. On the plane ride. Serena held Darcy's hand. She could tell she was nervous. Darcy had to admit she was too. They got to Palm Beach and took a cab to a very familiar apartment complex. They got up to the door and Serena went to knock when Darcy reached into a flower pot she had painted when she was 5 and grabbed a key.

"How did you know that was there?" Serena asked.

"Because…." She went to say as the door opened and Lily stood there. "Lily?"

"Serena? Darcy?" Lily said.

"Hi" Darcy said and walked past her. She walked over to her father's desk and looked at his calendar. He had four planners he kept super detailed. Her mom used to tell him that he was over organized.

"Where's Dad?" Serena asked.

"Beverly Hills" Darcy replied.

"Why are you girls here?" Lily asked.

"Serena is here to see William" Darcy responded "Her father."

"Darcy came to support me" Serena said a little confused. She never told Darcy her father's name.

"Not completely true S." Darcy said and turned to Lily "I'm pretty sure you know who I am in this story. You are after all wearing my mom's robe."

"What's happening?" Serena said.

"How long have you known?" she asked Lily who didn't seem shocked at all.

"William left because Olivia was sick. I knew deep down that was the love his life."

"They were soulmates." she replied.

"When I saw you in that elevator, and you said your name. It clicked. You look so much like her and then you look a lot like him. You have his eyes. Serena does too"

"Thank you" she said.

"I'm still confused" Serena said and Darcy grabbed a picture of her and her family from her parents' wedding and handed it over to her.

"William is my father. As well as yours" Darcy said. "I guess that makes us sisters. Well half."

"If you both sill down I'll explain why I'm here" Lily said.

"You're sick. My… our Dad told me that he was treating an ex of his. That's all" Darcy said sitting down next to Serena. Saying ours was gonna be hard.

"Mom" Serena said.

"Your father is treating me. I'll be okay" Lily said and sat between them. "I hope you two can be okay with this. I need you both to be. It's the only way this will all be okay."

"Yeah" They both said and Lily grabbed each one of their hands and squeezed it.

A/N: There it is. A lot of you saw this coming. This was actually one of the first chapters I put together. Of course it changed after putting together the 60 chapters before but I needed all of those to add up to this moment. I wanted Darcy to piece it together before actually knowing because she needed to come to terms with it. I know a lot of people are gonna think Lily's reaction to it is unlike her but I kinda thought that knowing that Darcy probably came before Serena and Eric she couldn't be all that mad because Olivia came before Lily (at least in this story)