End of Parenthood

I am not yet a parent but am like one to my younger brother. Our current situation makes me ask, 'when does parenthood end?'. Is it after the child is born into this world? I think not, I have seen other parents who does not stop being a parent to their children until the day they die.

I am currently the one taking the responsibility of my parents. Earning for us both, making ends meet most especially for my younger brother to finish his education. I have assumed parenthood years ago when my parents parted ways. My dad seems not to care and my mom, I think, might still be in a state of depression (though their separation happened years ago). I am not blaming them for anything but I cannot help but ask 'have they forgotten that they still have children?'.

I don't want this post to be mainly a ranting or an angry outburst. I am wondering if how many others are there who are living the life of independence from parents not by choice but by circumstance.