Ashley,
when we read your biography we notice that you may even be older than 15 years- but you still are a youthful princess. You had the purrfect instinct to find a new home when you needed it and also to help your owners when their older kitties passed away- that was certainly a win-win situation.
We are not surprised about your character- you have what we here call tortietude and it does not seem to be diluted
Enjoy your day of celebration and get some extra cuddles for that pretty belly of yours.