Martin Short, 75, is reportedly consumed by guilt and grief following the suicide of his daughter, Katherine Hartley Short, who was found dead at her Hollywood Hills home on February 23. Concerns for his relationship with Meryl Streep, 76, are raising concerns that this loss could negatively impact their romance. Katherine, who reportedly had a history of depression and mental health struggles, was one of three children adopted by Martin and his late wife, Nancy Dolman, who died in 2010. The death follows the passing of Martin's longtime friend Catherine O'Hara and the slaying of filmmaker Rob Reiner and wife Michele.