Well, it depends on your own personal definition of mature because at the general, no one ever gets mature. Sometimes, you would see elderly ones playing like kids or eating same. If you are speaking about maturity in body development or age, well, I realized quite a lot of things.
First, I wasn't interested in collecting cash from mummy and daddy but wanted to make my own cash that I could spend freely without questioning. Also, I was very enthusiastic to go live on my own as I didn't enjoy any longer being corrected for just trivial issues.
There was also the need to eat what I wanted and not what everyone was eating. I could then go to the kitchen and prepare a meal for myself or for everyone but it was centered on me making that choice.