I have been on my own since 13 YO, so it is like the situation teaches you to become wiser faster because there is no mummy to take care of your belly ache. I hate that my childhood memory is but pain, abused, and loneliness.
I emerged as fully function adult by 15YO with plans, goals, and attitude. Despite this side of maturity, being financially independent also brought the means to acquire toys and live a live "in the fast lane." So, things were like "who cares" until my first kid was born. His birth -and that of his siblings- bought a stop to my "care free" life, I just could not party as an animal anymore, "what if the kid needed me, and I could not be there for him (them)? "So, I can become a "trained animal" However, the kind of work I do is anything but boring, it kinds of keeps me "on edge"
Now my kids are almost all self reliant and soon I will be able to spend a more relaxed life...So, when I become and adult? I still believe in Santa, and Frosty, and...the thought of going to Disney elates me..so, when did I become and adult?