==Vanity Fair 1991 article== 
 Hi, Symbols, and may I reiterate that I enjoy seeing the good, solid work you're doing. Here's the exact passage from Nancy Collins' major feature in Vanity Fair, the issue with the famous nude pregnant cover:  

  
 Per my notes paraphrasing the rest: "Moore learned of him at age 13 when she found her parents' marriage certificate, dated February 1963." 

 So the Vanity Fair article doesn't say she married Dan Guynes right away, but "hooked up" with him. It's not unusual for couples not to marry until after a child is born. Either way, we can't say that Vanity Fair says something it doesn't say, and any deductions on our part would be original reserach.