Confront
Once the duo saw that their kids were safe and sound with their grandparents, sister and brother in law in the elevator on their way back up to the rooms; Castle and Beckett made their way over to their voyeur in the next room. Their minds were racing at inhuman speeds as they drew closer. Both Castle and Beckett both remembered one of times they had come across their voyeur.
"Castle?"
"Crap."
"Hey. So I thought I'd see if Alexis remembers anything more about the man from the man from the sketches."
"Yeah, about the man in the sketches…. um, there's something you should know about him."
"What?"
"He's your future father - in - law."
"Nice to see you again, Kate."
"Katherine. I want to say this isn't what it looks like, but it is."
Meanwhile as Castle and Beckett made their way over to the restaurant; Martha's mind was racing too.
"If anything happens to them…"
"He's a smart kid. And she's good at what she does. No, they'll be fine. I promise."
"Forgive me, but your promises don't mean very much."
"You still play?"
"No, not so much anymore."
"A shame. You were good."
"That was a hell of a night."
"Hell of a night."
"You remember the song you played? My Funny Valentine?"
"It was a long time ago."
"What are you doing here? Beckett asked.
"It's Father's Day; I thought it would be nice to be with my son and grandkids."
Castle barely spoke.
"So dropping by while we're on vacation and just watching us was the way to go?"
There was silence; it seemed to be the voyeur's way of answering Beckett's question.
"Happy Father's Day; son. You got some beautiful kids."
"Thanks Dad, Happy Father's Day."
Castle and Beckett hadn't told the kids about Castle's father; Alexis was the only one of their kids that knew out of her and her siblings that they had a spy for a grandfather.
After a lot of talking and Beckett relenting some so that Castle didn't feel like he was fatherless on a day that was all about fathers; the duo invited Jackson to join them. Castle and Beckett had a lot of explaining to do once they got upstairs.