[Melian]

Did you know Gloria Vanderbuilt had a third son, who disappeared for 40 years? Hmmmm.

https://heightline.com/christopher-stokowski-bio-family/

[smileyface]

interesting that Carter, the brother that committed suicide, is dressed in blue stripes; notice the positioning and body language of Gloria, Anderson, and Carter...

[Tuscaloosa Goldfinch]

Re: Vanderbilt's children - it looks like there was a 4th one as well, full sibling to Christopher. And the article is confusing as well - did you notice it used the term step-sibling rather than half sibling to refer to the different sets of children?

All in all, personally I'm thinking that it's not Gloria Vanderbilt and not Anderson who was mentioned in the previous comments. That's just me.