GNZ GEN Z GEN Z. HAVE YOU EVER CONSIDERED TAKING ONE OF THOSE DNA TESTS? DID YOU EVER STOP BECAUSE YOU WERE AFRAID WHERE IT MIGHT LEAD? YOU'RE NOT ALONE. TODAY WE'RE TALKING DNA SECRETS. ON OUR NEXT GUEST'S 56th BIRTHDAY HER FOUR OLDER SIBLINGS GAVE HER AN AT-HOME DNA TEST. LITTLE DID THEY KNOW IT WOULD CHANGE THEIR LIVES FOREVER. WATCH THIS. >> I WAS THE YOUNGEST OF FIVE CHILDREN. I THINK I HAD A PRETTY HEALTHY, NORMAL, PRETTY FUNCTIONAL CHILDHOOD. MY PARENTS WERE VERY FAMILY ORIENTED, VERY COMMITTED TO THEIR CHILDREN ANDED TO GIVING US A SOLID START IN OUR LIVES. MY FATHER HAD A VERY STRONG WORK ETHIC AND HE TAUGHT THAT TO HIS CHILDREN. I'VE BEEN THE AMATEUR FAMILY AGAINIOLOGIST FOR ABOUT -- I STARTED 30 YEARS AGO. I REALLY ENJOYED DOING RESEARCH ON THE FAMILY. I FOUND MY DAD'S SIDE OF THE FAMILY WE'RE RELATED TO WYATT EARP. MY PSZ BROTHERS AND SISTERS CAME TOGETHER TO GIVE ME THE DNA TEST FOR ALL OF THEM. I WAS VERY QUICK ABOUT GETTING IT IN TO GET THE RESULTS BACK. IT MATCHES YOU TO PEOPLE WHO ALSO TESTED WITH THAT SAME COMPANY SO YOU COULD SEE WHO YOU SHARE DNA WITH. IT WOULD SORT MATCHES BY WHO YOU SHARE THE MOST WITH. SEVERAL MONTHS LATER MY OLDEST BROTHER DECIDED HE WAS GOING TO TAKE THE TEST AS WELL. HIS RESULTS CAME IN. THERE WAS SOMEBODY ELSE I SHARED MORE DNA WITH THAN I DID MY OWN BROTHER, WHICH WAS VERY ODD TO ME I SHARED MORE DNA WITH A TOTAL STRANGER THAN I DO WITH THE MAN I GREW UP WITH. THAT DIDN'T MAKE SENSE TO ME. FROM THERE I REACHED OUT TO THE DNA TESTING COMPANY. AND THE WOMAN ON THE OTHER END OF THIS CHAT IMMEDIATELY KNEW WHAT SHE WAS LOOKING AT, AND SHE TYPED BACK, THAT MEANS HE IS YOUR HALF BROTHER. I LOOKED AT THE SCREEN AND I JUST BACKED UP. THERE WAS THIS LONG AWKWARD PAUSE. I KNEW AT THAT MOMENT THAT WHAT I WAS SEEING WAS NOT NATURAL, WHICH MEANT I WAS ABOUT TO BLACK OUT. THIS PERSON I DIDN'T KNOW WAS CLEARLY A PATERNAL MATCH. >> WOW, WHAT KATHERINE FOUND OUT FROM HER DNA TEST WAS THAT THE MAN WHO RAISED HER WAS NOT HER BIOLOGICAL FATHER. SHE JOINS US NOW. KATHERINE, THANK YOU FOR BEING HERE. >> THANKS FOR HAVING ME. >> THAT'S EMOTIONAL FOR YOU. YOU'RE TEARING UP WHILE YOU WATCH THAT? >> YEAH. FEELING THAT PAIN CAME BACK. >> IT'S NOT -- IT'S INTERESTING FOR PEOPLE ON THE OUTSIDE, BUT FOR SOMEBODY WHO IS LIVING IT, IT CAN BE KIND OF DEVASTATING IN THE MOMENT. >> OH, IT WAS. IT WAS. I FEEL LIKE I'VE COME A LONG WAY IN THE PAST 15 MONTHS SINCE I MADE MY DISCOVERY. BUT GOING BACK AND RELIVING IT BY WATCHING THIS RIGHT NOW BROUGHT IT ALL BACK. >> SO WHEN THE WOMAN SAID TO YOU, THAT MEANS HE'S YOUR HALFS THOUGHT WAS YOUR FULL BIOLOGICAL BROTHER GROWING UP. DID YOU REALIZE THAT'S WHEN IT MEANT, HE WAS YOUR HALF BROTHER? WHAT THAT MEANT ABOUT YOUR PARENTS AND SO ON. >> MY RESPECT FOR SCIENCE WAS TELLING ME THIS WAS A FACT THAT I NEEDED TO ACCEPT BUT MY HEART WAS HAVING A REAL HARD TIME WITH IT BECAUSE IT NEVER, EVER, EVER OCCURRED TO ME THAT THIS COULD EVEN BE POSSIBLE. >> THEN YOU HAVE TO START TO WONDER, LIKE, WELL, IS THIS TRUE -- WHAT'S THE DEAL FOR ME AND ALL MY SIBLINGS? HOW DO WE ARE E TO ONE ANOTHER. >> IT MADE ME QUESTION EVERYTHING. >> WHAT DID YOU FIND OUT, THEY ARE ALL, FOR LACK OF A BETTER WORD, FULL BIOLOGICAL SIBLINGS, AND YOU ARE THE ONE THAT IS A HALF TO THEM. >> OF MY FOUR SIBLINGS I GREW UP WITH, THREE OF THEM TESTED SO FAR. THEY HAVE CONFIRMED THEY ARE FULL SIBLINGS AND THEY SHARE DNA WITH OUR DAD'S SIDE OF THE FAMILY. I'M THE ODD ONE OUT. >> YOU DON'T. >> I DON'T. >> WERE YOUR PARENTS ALIVE WHEN YOU GOT THAT RESULT? >> NO, THEY HAD BEEN PASSED AWAY YEARS BEFORE. >> SO NOW YOU HAVE TO BECOME A DETECTIVE. >> YES. >> TO FIGURE OUT, WHAT'S THE STORY THERE. >> YES. >> SO WHAT DID YOU DO? >> THE FIRST THING I DID WAS TRY TO DETERMINE WHO THIS FIRST PERSON WAS I SHARED THE MOST DNA WITH. SO I REACHED OUT THROUGH E-MAIL TO THIS PERSON. FORTUNATELY FOR ME SHE RESPONDED IMMEDIATELY. AND BETWEEN THE TWO OF US, WE DID OUR OWN DIGGING AROUND AND ASKING QUESTIONS AND FIGURED OUT THAT MY MOTHER WORKED FOR HER DAD FOR A BRIEF PERIOD OF TIME BACK IN 1960. AND SHE SAID I'M CERTAIN I'M YOUR HALF SISTER. >> SO YOU AND SHE ARE HALF SISTERS THROUGH YOUR FATHER. >> THROUGH MY BIOLOGICAL FATHER. >> ITALY YOUR BIOLOGICAL FATHER, NOT THE MAN WHO RAISED YOU. >> EXACTLY. >> IS THERE A REASON SHE WAS MORE RELATED TO YOU ON THE DNA TEST THAN YOUR BROTHER? THEY ARE BOTH HALF SIBLINGS? >> THERE'S AN AVERAGE RATING ON HOW THEY DETERMINE WHO HALF SIBLINGS ARE VERSUS WHO WHOLE SIBLINGS ARE. SHE WAS WITHIN THAT RANGE, SHE JUST HAPPENED TO SHARE A LITTLE MORE DNA THAN MY BROTHER DID. >> SO NOW YOU'RE SITTING THERE SAYING, I'D LIKE TO KNOW MORE ABOUT THAT MAN. >> YES. >> I'D LIKE TO KNOW MORE ABOUT HOW MY MOM KNEW CATHERINE ST. CLAIR HAS RELISHED RESEARCHING HER FAMILY'S GENEALOGY. IN 2016 SHE FOUND OUT WITH THE HELP OF A DNA TEST THE FATHER WHO RAISED HER WAS NOT ACTUALLY HER BIOLOGICAL DAD. CATHERINE TURNED TO SOCIAL MEDIA FOR HELP FROM OTHERS WHO MIGHT BE GOING SOMEWHERE SIMILAR. SHE FOUND DNA NPE FRIENDS, AN EMOTIONAL SUPPORT GROUP ON FACEBOOK FOR THOSE NOT PARENT EXPECTED. WELCOME BACK, CATHERINE. >> THANK YOU. >> CAN I ASK YOU, WAS THERE EVER ANY SIGN GROWING UP YOUR DAD WAS NOT YOUR BIOLOGICAL DAD. >> NONE AT ALL. >> NO CLUES. >> NONE. >> WHEN YOU HOOKED UP WITH THE WOMAN WHO HAPPENED TO BE YOUR HALF SISTER, WHAT DID YOU LEARN ABOUT YOUR BIOLOGICAL DAD? >> I LEARNED HE WAS IN THE SAME TOWN WE GREW UP IN ALL THOSE YEARS. WE NEVER CROSSED PATHS. TWA US A SMALL TOWN. AND THIS HE HAD A DAUGHTER FROM HIS FIRST MARRIAGE AND A DAUGHTER FROM HIS SECOND MARRIAGE. THAT'S WHEN I LEARNED ABOUT MY SECOND SISTER I DIDN'T KNOW I HAD. >> DID YOU LEARN ANYTHING ABOUT HIS RELATIONSHIP WITH YOUR MOM? >> NO. >> SO TO THIS MOMENT WE HAVE NO IDEA HOW IT HAPPENED. WE KNOW HOW IT HAPPENED. YOU KNOW WHAT I MEAN, YOU DON'T KNOW THE STORY. >> I DO NOT KNOW THE EXTENT OF ANY RELATIONSHIP THEY MAY OR MAY NOT HAVE HAD. >> SHE WORKED IN HIS STORE. >> YES. >> WHAT KIND OF STORE WAS IT? >> IT WAS LIKE A GIFT SHOP. >> SO IT'S A MYSTERY YOU'RE NOT GOING TO BE ABLE TO SOLVE. >> I'LL NEVER KNOW. I'M GOING TO HAVE TO ACCEPT I'LL NOT HAVE ANSWERS I'D LIKE TO HAVE. >> THE SUPPORT GROUP, PEOPLE SAY WHY DO YOU NEED A SUPPORT GROUP? IT'S SHOCKING, JARRING, SEEING THE TEARS IN YOUYOUR EYES WHEN RAN THAT PIECE, IT'S DEEPER THAN THAT. >> IT'S A TRAUMA. I WOKE UP AND DECIDED I'M GOING TO CREATE A SUPPORT GROUP. INSTEAD I HAD BEEN ON FACEBOOK AND A PROMINENT RADIO PERSONALITY HAS A PAGE AND POSTED ON THERE, DNA TESTS ARE REALLY INTERESTING, WHAT HAVE YOU LEARNED FROM YOUR DNA TEST. I WENT, I LEARNED MY DAD WAS NOT MY BIOLOGICAL FATHER. I WALKED AWAY AND I HEARD A NOTIFICATION ON MY PHONE SOMEBODY WAS SENDING ME A TEXT. I THOUGHT IT WAS ONE OF MY FRIENDS. IT WAS A WOMAN I NEVER HEARD FROM BEFORE. IT WAS ONE SENTENCE, OH, MY GOD, I THOUGHT I WAS THE OM ONE. WE TEXTED FOR THREE HOURS STRAIGHT. WE CRIED, SHARED OUR FRUSTRATIONS, OUR FEAR. WE VALIDATED EACH OTHER. WE VALIDATED OUR FEELINGS. WE FOUND OUT WE WEREN'T CRAZY, WEREN'T FREAKS. AT THE END OF THAT THREE HOURS I SAID TO HER, NOTHING HAS CHANGED FOR ME, NOTHING HAS CHANGED FOR YOU, BUT I FEEL BETTER. JUST TALKING TO YOU, I FEEL BETTER. LATER SHE TOLD ME THAT WHILE WE WERE TEXTING DURING THAT THREE-HOUR PERIOD, EVERY TIME SHE WOULD TYPE SOMETHING TO ME, HER HEART WOULD POUND HARD IN HER CHEST AND SHE WOULD SAY, PLEASE, GOD, LET HER RESPOND AGAIN. I'VE GOT TO TALK TO THIS WOMAN. WE LEARNED FAST WE WERE HELPING EACH OTHER EVEN THOUGH NOTHING CHANGED. I SAID MAYBE WE CAN FIND FOUR OR FIVE PEOPLE LIKE US, THEY WOULD HELP US FEEL BETTER AND WE COULD HELP THEM. IT WAS PURELY SELFISH MOTIVATION. >> HOW MANY PEOPLE IN THE GROUP NOW? >> WE'RE PUSHING 3,000. >> WOW. DO YOU HAVE A RELATIONSHIP NOW WITH YOUR HALF SISTERS? >> I HAVE AN AMAZING RELATIONSHIP WITH THEM. WE ARE -- I KNOW WE'RE PROBABLY IN THE HONEYMOON STAGE. WE LOVE EACH OTHER. I GOT TO MEET BOTH OF THEM. WE SPENT SOME TIME TOGETHER FOR MY ELDEST SISTERS BIRTHDAY. >> THEY LOOK A LITTLE LIKE YOU. >> WHEN I WALKED INTO THE RESTAURANT AND RAY ETTA WHO IS ON THE LEFT, THE HAIR ON THE BACK OF MY NECK STOOD UP BECAUSE I WAS LOOKING INTO MY EYES. I HAVE AN UNUSUAL COLOR OF EYES AND SHE HAS MY EYES. >> DID YOU EVER GROWING UP LOOK INTO YOUR PARENTS' EYES AND SAY -- >> MINE NEVER MATCHED MY PARENTS OR SIBLING BUT I THOUGHT THAT WAS MY SPECIAL THING. >> JUST SPEAKING ABOUT IT, EVEN