Each time Setsuko Harmon meets her granddaughter, Sadie, it’s like the first time all over again.
Harmon was diagnosed with Alzheimer’s disease eight years ago, and her daughter, Christine Stone, reintroduces her to the month-old baby several times a day.
“My mom loves her,” Stone, 39, told TODAY. “She was here for Thanksgiving and she said, ‘Why can’t I take the baby? I want to take her home?’ It’s put some pep in her step.”
She added: “But her short term memory is gone. Every time I say, ‘Meet your granddaughter, Sadie,’ she’ll forget whose baby it is again five minutes later. She gets so excited all over again.”
Stone and Harmon first made headlines over the summer when Stone filmed a handful of the moments she broke the pregnancy news to her 77-year-old mother.
“I can tell her and two to five minutes later she won’t remember,” Stone previously told PEOPLE. “It’s like watching a kid at Christmas wake up and see his presents over and over again, because each time she gets so excited.”
Now, Harmon cherishes each moment with little Sadie, even singing to the baby.
“She remembers the words to an old Japanese lullaby song called ‘Donguri Korokoro’ about an acorn and an eel, and sings it to Sadie,” Stone told TODAY. “I only video the good moments, I don’t video the bad moments — and there are plenty of bad moments.”
She made similar statements to PEOPLE in June, calling the situation “very bittersweet.” She anticipated Harmon’s relationship with little Sadie.
“I expect her not to remember her, but I know when my mom meets my daughter she’s going to get excited every single time,” Stone said then. “It’s sad, but it’s not sad, because she will be just as excited to meet her over and over again.”