Aging Immortal: Science Fiction

She was the oldest person in the room, the one who would die, and the only one that was mortal. When she was a little girl, she'd enjoyed reading fairytales. After hundreds of years of infinitesimal aging, she sometimes felt like she had lived into one when she looked around her. Everywhere were eternally young, vibrant bodies, housing ancient souls (though not as ancient as she). There were some that looked older, yes--it had been the fashion that century, perhaps, or perhaps they really were old enough to have been past the age of ideal attractiveness when the antigerone had been completed. The second antigerone, the one that actually worked 100%.

Inspiration: Grooming the Roomba. Busy hands, idle mind--that's one of the ways that stories happen.
Story Potential: High, but not as it is. Aging cannot be the main plot, only the framework. Aging, mortality, and antigerone treatments have been thoroughly explored. Kids and population growth, mortality bequeathing the right to procreate, maybe? Nah, still not enough.
Notes: See, the antigerone was a successful leukemia, or cancer, treatment for kids. And she was the researchers daughter. And he was desperate. So she's been aging very very slowly for a very very long time.