Of course I can't blame my sweet little pet! I shall endeavor to keep her around for as long as possible, and for the most part, I would extend the same boon to the rest of the party, as allies and friends. And, I have something in mind that could help, both taken from necromancy splatbooks.
One is a 4th level spell called Halve Aging, a permanent duration spell that simply halves the rate at which the target ages. The second, Halt Aging, is a 5th level necromancy spell that for 1d10 years prevents aging... and neither has a substantial experience, focus or material cost, in gold or ethics. So, in the flying fortress, a special pool that confers a maximized Halt Aging spells on the bathers? Used once per decade, or if the spell is dispelled, could work if we go for some longer term things.
And want to pool our resources together Khan?