Cats age faster than humans. I know it’s something my girl has always been aware of. She decided to just go with it and enjoy the time she has with us. Seems to me it worked out well for her.

Kittens and adult cats age at different rates. Kittens that are a year old are about 15 years old in human years. And once kittens are fully grown adults at two years old are about 24 years old in human years. After that, adult cats age four years per one human year.

https://www.petmd.com/cat/general-health/how-old-is-my-cat-in-human-years