“I paid for some of the upgrades and the first thing that came up after I found out that I was part neanderthal, was this: Identical twin,” she said in the clip, showing behind her the family tree that indicates a mystery sibling with the initials BB. “That has to be a joke, right?”
Source: https://www.buzzfeed.com/ellendurney/chrissy-teigen-spiraling-after-identical-twin-revelation