Years before California real estate baron Donald Bren publicly disowned his alleged “man cave scammer” son this week, the estranged child sued him for millions in a messy court battle that exposed embarrassing details from the billionaire’s private life.

David Bren, 33, has been accused of swindling investors out of $2 million with a fake business he pitched as the “ultimate man cave” for the ultra-rich — including a suite of luxury vehicles and curated dining experiences — that never existed, according to lawsuits reported on by the Los Angeles Times .

Donald Bren — 93-year-old chairman of Irvine Company who has been nicknamed the “Donald Trump of Orange County” and now worth $19.2 billion, according to Forbes –– denied any ties to David or the alleged scam in a 12-word statement ear

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