The death of Tatiana Schlossberg is proving to be difficult to process for many of her family members, including her mom, Caroline Kennedy. "When you think about the losses Caroline has suffered, it was only [her brother] John that had suffered the same - and then she lost John," Kennedy historian Steven M. Gillon shared with People in an interview published on Tuesday, January 6. "For Caroline, it's a series of horrible personal tragedies that lead up to what may be the hardest of them all." On Monday, January 5, family and friends gathered at St.