Arnold Schwarzenegger’s cheating has sparked an angry divorce blow-up with his wife Maria Shriver.

The National ENQUIRER issue that hits stands today reveals that Arnold has been cheating on Maria for the past 12 years. “It’s gotten so out of hand that she can no longer look the other way,” a source disclosed.

The world-exclusive cover story chronicles Arnold’s affairs with a leading lady, a stewardess, a stand-in, a makeup artist and others — and details Maria’s angry confrontation with the sex- obsessed superstar.

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