Jay Leno reveals the one thing that's been hardest since his wife's dementia diagnosis

• Jay Leno says the "toughest part" of his wife's dementia is that she relives her mom's death every day. • "And it was, not just crying, I mean, you're learning for the first time," Leno said. • Despite the challenges, Leno says he still finds joy in spending time with his wife each day.

Jay Leno says his wife, Mavis, experiences a heartbreaking moment every day due to her dementia diagnosis.

"I mean, probably the toughest part was, every day she'd wake up and realize someone had called today to tell her her mother had passed away," Leno told Hoda Kotb in a Today interview on Thursday.

"And her mother died every day for, like, three years. And it was, not just crying, I mean, you're learning for the first time. Each time was — and that was really tricky," the former late-night host