"You have been making all of the sacrifices in this relationship. I haven't been willing to compromise. I haven't done anything to deserve this ring. I have done nothing to deserve you."

"What makes you say that? Why would you ever think that?"

"Because it's true. When I get scared, or..."

"I know, you run. You hide. Kate I know you."

"I do stupid things," she reveals.

"What did you do?"

"I'm pregnant."

"What?!"

"I'm pregnant," she repeats.

"I heard you. I just don't understand. How does that make you a terrible person? I thought that you said you weren't ready. This is great news. Why would you say that you ruined everything?"

She swallows hard, "Because I did."

"How?"

"I wouldn't know where to start," she admits.

His smile fades. He studies her expression closely, "Oh, you're saying that you don't want a baby, now. You're saying that you're not..." he trails off.

"What?!"

"You don't want to have it? You just started a new job, you moved to a new city, and now isn't the right time?" He jumps to conclusions.

"That is probably all true, but I never said that I wasn't going to have it."

"Then I am lost," he wears a look of utter confusion.

"Castle I just found out, I don't even know what I want to do, yet."

"When did you find out?"

"After you left this morning. I was going to try and stop you from leaving, but I never made it that far. I ended up discarding my breakfast on the sidewalk."

"I'm sorry."

"I was so angry at you. I thought it was your fault. I thought maybe it was all part of your plan. You had said you wouldn't care if we had a shotgun wedding. You said you wanted three kids within five years. I thought maybe that you somehow sabotaged the condoms, or... I don't know what I thought."

"I am not the villain here. I would never intentionally get you pregnant, when I knew you didn't want to be. Do you think that I am that devious? I mean part of me is flattered, and the other part is really offended. You should know me better than that."

"For a second I thought that maybe it was your way of trying to getting me to move back to New York. Things have not been easy for us since I moved to D.C.. I thought it was your way of telling me that you didn't want me to take the job."

"Kate if I didn't want you to take the job I would have told you. I love you. I would never want you to pass up such a big opportunity for me."

"I do know that."

"So why did you think otherwise?"

"I was angry. I was shocked, I still am shocked. I couldn't figure out how this happened. We are always so careful."

"Accidents happen," he insists.

"I am the villain here," she admits.

He furrows his brow, "What?"

"I am the one to blame. All of this is my fault," she reveals.

"So you are the one who sabotaged the birth control? You wanted to get pregnant so that you would have a reason to leave the job, and come home?"

"No," she shakes her head.

"Then I don't understand."

"I told you, I did something stupid," she reminds him.

"I do stupid things all of the time. What is your point?"

She shakes her head, "Not like this."

"Like what?"

"When I was at the precinct I saw Javi."

"What does he have to do with any of this?"

"He asked me why I always sabotage my relationships."

"Yeah, why do you do that?"

"I don't know."

"Wait, are you saying that you sabotaged this relationship?"

"I really screwed up. I am so sorry," she begins to explain.

He looks at her. She stares back at him with hazel eyes, and a heavy heart. As she looks at him her eyes well with tears. His heart skips a beat.

"Sorry, for what?" He swallows hard.

"You really want another child, and..." she trails off as the tears threaten to fall.

"And what?"

"I cannot say with one hundred percent certainty that this one is yours."

"What?!" his eyes fall on her, in disbelief.

"Please don't hate me," she begs.

"Kate what are you telling me? What happened?"

"The night that you proposed," she begins.

"What about it?"

"I went home, alone."

"I know. I remember. You said you needed time to decide," he recalls.

"You were very understanding," she adds.

"So you decided to go screw someone else? You were afraid of commitment so you cheated? If you wanted out, if it scared you that much, you should have just asked."

"It wasn't like that," she insists.

"Then, what was it like, then?" He furrows his brow.

"He showed up on my doorstep with a bottle of tequila. He was trying to cheer me up. He was trying to talk me through it."

"Who?"

"Does it matter?"

"Who?!"

"It wasn't his fault."

"He got you liquored up, and then took advantage of you, and it wasn't his fault?"

"I am responsible. I came onto him."

"Who?"

"I am sorry."

"Sorry? You're telling me that you slept with someone else the night that I proposed to you?"

"Yes."

"Then why did you accept? You wanted to have one last fling before you committed to me for the rest of your life? What am I supposed to think?"

"That wasn't it."

"Then why did you accept?"

"I didn't know."

"You didn't know what? You didn't know that you would change your mind? You didn't know what?!"

"I didn't know that I slept with him. I had no clue. I was so drunk I ended up passed out on the living room floor. I didn't remember what happened that night. I still don't remember."

"Who was it?"

"Javi."

"Javi? I can't believe this. How could the two of you do this? Why would you do this?"

The tears stream down her cheeks. "I don't know."

"Kate why would you do this? Why would you sleep with him? Do you love him? If you wanted out, if you didn't want to be with me there were other ways. I really thought that I knew you better than this. Never in a million years did I think you would do something like this. I thought I knew what kind of person you were. I guess it just goes to show that you can never really know someone as well as you think you do."