part 12:    • Matt Barnes on Telling James Harden's...  
Part 1:    • Matt Barnes on Parents Being Function...  
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Matt Barnes opened up to VladTV about finding out about his then-wife Gloria Govan and his friend Derek Fisher hiding their relationship after Matt and Gloria were separated. Matt explained that he found out about their relationship after Gloria's conversation with Derek was broadcast in the car via her Bluetooth. Later that evening, Matt's son called him and told him that Derek was at their house, which Matt was paying for, which incensed him further. 

From there, Matt drove 15 minutes from his condo to the home where Gloria was staying, and after jumping the fence to confront them, he punched Derek. You can hear the full story, including the aftermath, above.