The two women met face-to-face at a diner and Tina saw a striking resemblance between Jill and Kathryn.
"Just sitting across the table from someone that you just met who looks just like your mother," she told People.
"What I'll never forget is when she got her lipstick out and put it on exactly the way my mum does. That's when I knew. I didn't need DNA after that."
Tina discovered her mother Kathryn was not related to her. Photo / People
The DNA test results confirmed what they already knew, deep down: she was Kathryn's daughter.
"I left my office and came home. My husband asked, 'What's wrong?' I told him, 'It's true. It's really true. I don't even know who I am anymore'," she said.
Tina's real parents, who raised Jill, passed away before they learned of the switch, so she never got to meet them.
"It will never be the same as it was before," Taylor said.
"My mum has to live with the fact that she never got to meet her biological parents".
In a crazy twist of fate, Kathryn's flower shop created the casket reef for Jill's father when he passed away in 2001. Both families didn't know each other back then.
Though still processing the news, Tina said there are silver linings for Jill.