Yes, it does. From what I recall it even nags you to set it up. At least, I know it nags you when, after setting it up, your backups fail for whatever reason (out of disk space, etc).

I know many of my wife's passwords (not word related ones, but most others), but she doesn't know mine. She still has accounts on all my computers though so she could get to all my files if she needed to. She doesn't know mine mostly because they're long and random so she'd probably have to write them down to remember, etc.

I have given a bit of thought to some sort of escrow account/file for this sorta stuff. But, we both have access to the bank account, insurance,... already, so it probably isn't that important. I'm sure her dad could do data recovery on my other systems if the need arose.