The Terminator star stunned fans by splitting from his wife of 25 years, Maria Shriver, last month (May11) and subsequently revealing he has a son with a member of their household staff from a tryst 13 years ago.
The housekeeper was named as the star's longtime help Mildred Baena, who went into hiding when the news broke, but she has now opened up about the affair, insisting Schwarzenegger was unaware her son, Joseph, was his because she kept the news a secret.
Baena tells Britain's Hello! magazine, "I never told him. I never told anyone except my mother. So much has been written about how he kept this secret of betrayal from his wife all these years - and how he kept me in the house with his family knowing Joseph was his. That is not true. Never have I told him Joseph was his son, never did he ask me, and never did we talk about it."
Baena reveals she got pregnant with Joseph around the same time that she also became intimate with her ex-husband Rogelio, and initially believed he was the boy's father.
She adds, "So at the time, I lived life as if Rogelio was the father and he abandoned me. That's what I believed. It wasn't until later as Joseph grew and I started to see the resemblance that I wondered - but it became more apparent as time went on. I knew Arnold was the father, and maybe as Joseph got older and began to look like him, he (Arnold) wondered. But he never said anything to me.
"The truth is we were intimate many years ago and it was me who kept the secret, not him."
Baena reveals the real identity of Joseph's father only emerged after Shriver became suspicious at the boy's likeness to her husband.