Author's note: Because I can't imagine a way to get rid of Kate Beckett that would be satisfying, I decided to write about the least satisfying way to get rid of Kate Beckett.

It was time, Alexis knew. This had been going on long enough. Eight years ago, her father had a breakdown when it came to relationships. After his second divorce, he felt he wasn't worthy of love. He told Alexis that he didn't believe in soul mates anymore and he would never have the epic love story that he so often dreamed about. She assumed that her father was only frustrated and would eventually grow out of it.

But everything changed the night of the book party. He began telling her about this woman he met, a woman named Kate. She was a cop with the NYPD. He even claimed that Alexis had met her the same time he did.

But Alexis didn't remember any woman.

The problems continued when her father said that he needed to shadow the detective on cases. He seemed happier than he seemed in ages. So when Alexis caught him writing at a coffee shop one afternoon when he was supposed to be at the precinct, she didn't say anything.

Soon, Alexis noticed that her father seemed to be falling in love with this woman and she became concerned that she had never met her. She made a call to the 12th Precinct that day and realization flooded her mind.

"Hello, this is Alexis Castle. I'm looking for a Kate Beckett. Is she there?" She asked the woman who answered the phone.

"I'm sorry, but there is no one here by that name. Let me grab someone else."

"Hi, are you Richard Castle's daughter?" The male voice asked.

"Yes, I'm calling for Detective Kate Beckett."

"This is Detective Ryan. Your father has been calling us asking for help researching his new book. He seems to think someone named Kate Beckett works here. But there is no one by that name."

"Thank you," Alexis said, slamming the phone down, startled. What was going on?

As the years progressed, she realized that her father was getting more responsible and fun. He seemed happier and more lively and he was inspired to write again. However, at this point, she and her grandmother knew the truth.

Kate Beckett was a figment of his imagination.

Alexis started visiting a psychologist, trying to figure out what had happened to her father. He suggested that her father created Kate Beckett as a coping mechanism for the trauma and depression he was feeling after his last relationship.

Eight years later, her father had concocted a belief that Kate had left him. Her psychologist told her that this could be him willingly separating himself from the creation in order to reclaim his life. Alexis breathed a sigh of relief when this happened, but found herself disappointed shortly after, when her father said that Kate had taken him back.

It was time for Alexis to do something final. She needed her father to let go of this fallacy of true love and go out there and find the real thing. She wanted him back, whole.

The only way to do that was to make him believe that Kate Beckett was dead.

That's what brought her here today. She held an apology in her eyes as she stared at her father, strapped to the bed, his head covered with wires. The doctor was one of the leading integration therapy experts in the world. He told her that he could help her dad believe that Kate Beckett was dead, once and for all…so he could finally let her go. Thankfully, the man told her that he could also make her father forget that she had any part in Kate Beckett's death. Instead, he'll only remember the man in the room with him, believing him to be Kate's murderer.

"No, sir. Don't do this." Castle cried. "Don't kill Kate."

"Kate Beckett is going to be dead by the end of the night, and there is nothing you can do about it." The man said. Then Alexis cringed and left the room as he heard her father screaming.

"You did the right thing, honey." Martha said as she waited outside. "We will have your father fully back with us.

An hour later the door opened and her father came out, his eyes brimming with tears. "Kate's dead."

He pulled Alexis and Martha into his arms. "I can't believe she's dead."

"But now you can move on," Alexis said softly. "She wouldn't want you to be devastated."

"No, now I'm going to avenge her death." Castle said, "Whoever took my wife away is going to pay."

Alexis closed her eyes.

Crap, this wasn't how it was supposed to go.