Hugh Hefner's Son Arrested

Hugh Hefner's son is making headlines, but not for a good reason: Marston, Hef's 21-year-old son, was arrested last night for allegedly attacking last year's Playmate of the Year … who also just so happens to be his girlfriend. Police were called to the California pad where the younger Hefner lives with Claire Sinclair, 20, after a Sinclair family member called 911. Sinclair was visibly injured, law enforcement sources tell TMZ, and she told police Hefner punched and kicked her and then blocked her from leaving. Hefner admitted to an argument, but denied hitting Sinclair, whom he has been dating on-and-off since 2010. (More Marston Hefner stories.)