It wasn't until she was eighteen, the day before she started her first job at the bakery, that Lilo had realized how much time had passed since Stitch had become part of her family. She'd seen friends lose pets; she understood that different species aged differently, and she didn't know how long an illegal genetic experiment's lifespan would be.
She'd sat up all night, holding him and sobbing, because she didn't know what she'd do without him.
Now she's sixty-five, retirement age, and Stitch doesn't seem to have aged at all. And she's suddenly worried what he'll do without her.