I'm quite curious about the full-length books available only to Prime members. I let Prime lapse, but I know my sister's password.

I even have a Fire tablet signed into her account, but Amazon in its wisdom won't let its best customers use Channels. I don't feel like signing out of my Audible account on my various devices
So I'm wondering what would happen if I sideloaded the Audible app from an Android device onto the fire tablet? I'll give it a try unless someone who's already gone that route says it's a non-starter. Falling that, I guess I can resurrect a defunct device.
Even absent Channels, I'd love to get the Android Audible app on my Fire thingies; it's got so much more functionally than the native player.