Awesome. If they start breeding at 5, and she's already nearly 75, then potentially she lived to see a (grand)^13-child of herself being hatched. And her (grand)^13-child will still see a (grand)^12-uncle/aunt hatch.
| Animal | Lifespan | Breeding Frequency | Potential Generations They Can Witness|
|---------------|-------------------|----------------------------|---------------------------------------|
| Turtles | Over 100 years | Every few years | 10-20 generations |
| Whales | Over 200 years | Every 2-5 years | 20-30 generations |
| Koi Fish | Over 200 years | Multiple times a year | 30-50 generations |
| Elephants | 60-70 years | Every 4-5 years | 10-15 generations |
When I was a kid (I'm 51 y/o now) I remember learning that there were still one or two tortoise alive that were born before the... French revolution (1789).