Claudia, a cardiology technician, found an abandoned baby at Richmond University Medical Center in Staten Island in 2004.

“I opened the stall, and I saw this little precious thing tucked under the toilet tank and wrapped in a blanket,” she told CBS News about Vicky, who was only a few days old. “I just scooped her up and ran to the clinic.”

Now 19, Vicky visited the spot Claudia found her in for the first time on Tuesday.

“Now knowing the story, it definitely is a lot but in a good way,” she told the outlet.

Vicky knew she was adopted but wasn’t aware of the story behind her adoption. She thought Claudia was a close friend of her adoptive mother, Angela. The 19-year-old learned the full story about a month ago.

A year and a half before Vicky was found, Angela had adopted Frank, who was found in a diaper bag on the steps of Bellamy’s Christian Day Care.

Now 20, Frank also recently learned about how the story of his adoption. His curiosity led to the family acquiring kits from Ancestry.com.

“Maybe you have some relatives in common. You’re both from Staten Island,” Angela told Frank and Vicky.

Brother and sister submitted their tests and made the discovery.

“I got the match that my brother had popped up as my full sibling, my biological brother,” Vicky said.

“I was driving home, actually, and she called me and she was telling me, like, ‘Oh my god, we’re biologically related,’ and I was like, ‘Yeah, OK, whatever.’ Little did I know I’ve been living with my blood my whole life. It’s insane,” Frank added. “We were both found a year and half apart and wound up with the same family. The odds are insane.”

The discovery came as a surprise for the whole family.

“How did I miss this? Because I wasn’t supposed to miss it. They’re my children,” Angela said.

Dennis, their father, said people regularly asked if Frank and Vicky were related but he had always answered that they weren’t.