In college Tony donated to a sperms bank and never thought about it again quick 100 bucks and never thought it again. Kenzie always wanted to be a mother and got sick of waiting for Mr. Perfect so she went to the sperm bank and ended up picking Tony's. Back then they didn't know each other but now they do. She's the translator for NCIS and the more shes gotten comfortable about Tony, Tim, Gibbs, and Ziva the more shes opened up about her life outside of work and her kids. Yeas you read that right kids she had 3 kids sharing Tony's DNA and neither of them knew it. Till Tony got framed for murder and it came up with three offspring in the system her kids. Since she was an official government agent and worked at different places interpoll had her kids DNA. She was not in the office when they found that out Tony was gobsmacked did she know he was donor she chose. He had a million and one questions yet he had this overwhelming feeling like he wanted to meet these kids to see if they were like him at all. So when she came back in he stopped her in the elevator of course he pulled the emergency lever turning to her. Tony: You have kids