It sounds like the voice of a boy/man who felt neglected because his mother spent a lot of time on his sister's and her own hair, but then it turns into the voice of a woman who promises to do better by her sons and daughters.
I took it to mean that a grown woman was thinking back on her neglectful mother and the reasons why, only to make an inner vow not to repeat her mom's behavior.
I know it's a little odd, but when I read it, it seemed perfectly cool.
I read it more broadly, as a reminder not to let the "needy" family member(s) take up so much of your time and attention that others are left to sort things out on their own.
