Foster told the magazine that Charles sometimes strikes a funny pose when he sees the paparazzi, saying to his mother "Why can't we? Why can't I get photographed? I like it!"
Foster has also famously evaded questions about her sexuality. Though she's never denied being gay, she's never come out either, leading columnist Musto to say she lives in a "glass closet."
For 14 years, she was linked to movie producer Cydney Bernard. Bernard adopted Foster's two children and the two women wore matching Tiffany eternity rings on their wedding fingers.
In December 2007, Foster made her first public acknowledgement of Bernard, calling her "my beautiful Cydney, who sticks with me through the rotten and the bliss," while accepting an award at a Los Angeles film gala.
Five months later, media reports circulated that the long-time couple had broken up.
Musto believes that if Foster leaves the glass closet, she's less likely to be involved in incidents like the one with the young photographer.
"I think coming out of the glass closet could only be a positive step for her," he said. "It would take her from the shadows and into openness and make her feel like there's way less to hide."