Regardless of when I go to bed, someone needs something. (Nightmares, thirst, BabyB wants to nurse, someone has fallen out of bed, ad infinitum.)
There exists a direct ratio between the earliness of the hour I try to retire and the severity of neediness expressed.
I have three children who nap asynchronously. (No reliable naptime for mom.)
When sleep = sanity, (and lack thereof = severe depression), given the above condition, I only arrive at irrational solutions.
This is unsustainable.