Adriana, 39, and her husband Leandro, 37, who did not want to share their surnames, have known each other for 10 years and now have a six year old daughter together.
Both Adriana and Leandro, who live in Sao Paulo, had been searching for their mother for a number of years.
"In our next conversation, I started to get some clues and figured she might actually be my sister.
This kind of shocked me, so I decided not to contact her for a few days," Erik said.
A Brazilian husband and wife have discovered - live on the radio - that they were brother and sister.
Both had searched for their mothers, who abandoned them as children, but it turned out they were looking for the same woman.
Leandro knew his mother was called Maria, and that she had abandoned him at the age of eight. Adriana knew her mother was also called Maria, and that she had been abandoned at the age of one. The couple thought that their mothers, who they believed to be two different women, should the same name was a “coincidence,” as Maria is a common name in Brazil.
But Adriana’s refusal to give up the search for her mother led her to calling into to Brazilian radio station Globo Radio, and eventually managing to speak to her mother on programme, which specialises in finding lost relatives, the Mirror reports.Erik had tried to track his sister down in the intervening years without success.But their paths would cross again when Erik, who had returned to Holland to study, joined dating app Tinder and swiped through looking for matches.At the end of Adriana’s conversation with Maria, her mother revealed she also had a son called Leandro, who did not know her.Adriana, shocked at the realisation that her husband was also her brother, said: “I don’t believe that you’re telling me this. They’re both 44, born two months apart in different towns in the Bay Area.