Couple in Brazil learns they are brother and sister

BRAZIL (NEWSCHANNEL 3) - A couple made a surprising discovery while on a live radio show.

Adriana and Leandro, who have opted to withhold their last names, went on a radio show in Brazil to look for their birth mothers.

They were both abandoned as babies, and while on the show, they discovered they have the same mother--and are actually brother and sister.

The couple, who live as husband and wife, but are not legally married, have a 6-year-old daughter.

They have vowed to stay together.