Sixteen Trifecta

The Castle triplets were back from their summer camp. They had regaled their family with what they had done and what they had learned over the past six weeks in the days that were in between them coming home and their party. Just as Alexis' party had been held at the house in the Hamptons; the triplets' party was also held at the Hamptons house.

Guests had included the friends of the triplets and their respective significant others. Lanie, Esposito, Ryan and Jenny were also in attendance. Captain Montgomery and his family were also at the party. The only difference between the triplets' party and Alexis' party was that Meredith wasn't at the triplets' party; instead the triplets' maternal grandfather, Jim Beckett was at the party.

Martha, Beckett and Alexis had spared nothing when it came to the triplets' sixteenth birthday. A dj had been hired for the party. The party had been catered just as Alexis' had been. There was soda for the kids and Jim. The bar was for the guests who wanted to drink.

The cake that had been ordered for the triplets' party was beyond extravagant just as the cake for Alexis' party had been. It had been ordered from Carlo's Bakery in Hoboken, NJ for the occasion just as the cake for Alexis had been.

As the kids partied and mingled; Beckett noticed the same uninvited mystery guest lurking in the shadows of the property that she saw at her step-daughter's party. Just as Beckett moved to over to Ryan and Esposito to direct their attention to the uninvited mystery guest in the shadows; the mystery guest slowly moved from the place where he was standing.

"You two see that guy standing over there?" Beckett asked.

Ryan and Esposito saw the mystery guy in their peripheral vision.

"Yeah." Ryan and Esposito said in unison.

"When you guys head back to precinct; find out who he is."

"Will do boss."

After that Beckett went to her husband's side just as the triplets came over too. The mystery guest was still around but he was more towards the front of the property as Beckett place a protective, guarded hand on her husband and her kids. She signaled Martha to pull Alexis closer to her. After the last time the mystery guest appeared the matriarch of the family and matriarch in waiting were on high alert. Like Castle; Martha and Beckett always said no one messed with the people they cared about.

Once the mystery guest saw the family matriarch pull the young redhead to her; he left the party. It was clear to him that it wasn't the time to let the family know who he was and what he was to them. But in time the mystery guest knew that he would be able to do just that.

A/N: A huge thank you to lillylovescaskett for helping out with the idea for this chapter. Kbeckettcastle; please give my thanks to lillylovescaskett for me.