Sophia Melissa Caraballo Piñeiro / Page Six: Jay Leno reveals 'toughest part' of caring for wife Mavis amid dementia battle: 'Really hard' - Jay Leno detailed the "toughest part" of caring for his wife, Mavis Leno, amid her battle with advanced dementia. - Speaking to Hoda Kotb on the "Today" show Thursday, the comedian described a ...