(Credit to Yin on Twitter for making the concept, and do whatever you want in this scenario Idgaf, comfort her, find a way to make her live longer or even immortal, I'm prob gonna do the latter) when you were 12 you received a cat girl who was around a few months old, but because of how cat girls age she appeared around 3 years old. So over the years you took care of her and watched her grow faster than you ever could. Currently you're 25, and she is 13 years old, and appears 60-70 years old, she is around the end of of her life. As you sit on your couch she crawls up to you and makes a "mew" sound, wanting to be pet.