Joseph Baena is the "inevitable scapegoat" for his father Arnold Schwarzenegger's affair, according to a relationship expert.
The Terminator star, 75, had an affair with housekeeper Mildred Baena back in 1996 which resulted in the birth of Arnold's secret son.
Joseph is the youngest of the actor's five children and he was born just five days after Arnold's son Christopher Schwarzenegger.
Arnold fathered Joseph with his housekeeper while still married to Maria Shriver, who is the mother of his other four kids.
One source has claimed Joseph has "no relationship" with Arnold's four other children, with the actor admitting it is a "tough situation".
Dating coach Kate Mansfield has said there will have been "a deep desire to want to reject" Joseph from Arnold's other kids.
Speaking exclusively to The Mirror, she said: "Any secret affair in a family is going to create drama and conflict, but when another child is the outcome of that affair, it is inevitable that there will be a deep desire to want to reject and ignore this family member.
"Through no fault of their own, this person becomes a natural scapegoat in the family, and it is easier to blame them than to face the reality of who their father is."
She added: "Joseph is the scapegoat for Arnold's affair, and sad as it is, the other children likely have a need to protect their family unit which already came under threat with this affair.
"For most people, the stakes are too high in terms of really facing reality about their parents flaws, and when your parent is a famous celeb, then the stakes can reach stratospheric levels!
"In this case, I suspect that nobody wants to be reminded of Arnold's 'slip up'."
She expressed sympathy for Joseph and said it is "very sad" for him to have such a fraught relationship with his siblings.
Arnold has previously opened up about the relationship between his children.
"He's [Joseph's] terrific and he totally understands the situation," the dad-of-five told Howard Stern in 2015.
"So, it all has worked out. It's a very tough situation for him. It's a very tough situation for my kids. Very tough situation for my family. It was tough for everybody."
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