Courtesy Entertainment Tonight
05/24/2011 AT 05:35 PM EDT
For the last 13 years, Rogelio Baena thought the boy born to his then-wife Mildred "Patty" Baena was his biological son.
It wasn't until a week ago, when Arnold Schwarzenegger announced that he had fathered a love child
with a household staff member, that Rogelio discovered the truth.
Breaking his silence, Rogelio tells Entertainment Tonight
that the situation was a "betrayal" and that he had always considered Schwarzenegger – who employed Patty for 20 years – a "hero."
In the interview airing Tuesday, Rogelio says he has a message for the boy: "I am your father. That's all."
It was not immediately clear how much interaction Rogelio has had with the boy. According to divorce papers
, Rogelio and Mildred – married for 10 years – split in 1997 just weeks after the child's birth, and that Mildred filed for divorce in 2008.