Mildred Baena's Son Did Not Know Arnold Schwarzenegger Was His Father

According to a report by the New York Post, Arnold Schwarzenegger's son with former mistress Mildred "Patty" Baena had no idea that the actor-turned-politician was his biological father.

Born just days after Arnold and Maria Shriver's youngest son, Christopher, sources close to the Baena family say that the boy, now 13, referred to his mother's current boyfriend, Alex Aguiar, as his dad.

Schwarzenegger bought many gifts for the child over the years, and reportedly provided the down payment for the family's home, but Patty kept the Governor's secret from everyone -- including her son.

"He had no idea," a source tells the newspaper.

The boy was a toddler when Baena informed Arnold that he was the father, and for years managed to keep the affair and the child's paternity from her mother and sister, who also worked at the Schwarzenegger home.

A source close to Baena's relatives alleges that the Terminator star also groped Patty's mother and sister on a regular basis (her sister, Miriam, still works for Arnold), but a member of the family says that they are all upset with Patty for her actions, and for hurting Shriver.

Maria would always make sure to help us, even with the little things, gifts, Christmas stuff, things like that, and now we end up making her go through this crap because of Patty. It's not cool," says the family member. "The family is not happy with Patty right now because she never told us or warned us and now we have to deal with all this attention."

While Patty's family assumes that the boy now knows the truth about his father, they do not know what Baena has told him about the affair and the media frenzy it's caused in the past week.