NEW YORK — Former "Tonight Show" host Jay Leno shared emotional details about caring for his wife Mavis as she battles advanced dementia, telling NBC's "Today" show in an interview aired Thursday that the toughest part has been watching her relive her mother's death repeatedly.

Leno, 75, said his wife relived learning about her mother's death every day for years, describing the experience as "really tricky."

"Her mother died every day for, like, three years," Leno told host Hoda Kotb. "And not just crying, I mean, you're learning for the first time."

Despite the challenges, Leno said Mavis, 79, still recognizes him, though he acknowledges she may eventually forget. "She seems extremely comfortable now. And she seems happy, and she seems contented," he said.

The comedian, who married Ma

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