"I've always known I was an accident… thanks in no small part to you, dad." She glared at her father. Castle smirked and shrugged. "I just didn't know there was a story to it. And judging by the reaction of the crowd… I'm in."
They would leave this room as new people but she needed one last time as them. Little did they know, they were not alone. Veritas insert/what if.
She pulled back so she could look him square in the eye before boldly announcing "I'm claiming you."
All Beckett wanted was to talk. Post-ep 6.17 "In the Belly of the Beast"