hey so Nesta can't neglect Feyre in the legal sense. Neglect is when the party responsible for supplying the needs of another fails to do so.
Nesta is not Feyre's mother. She is not her father. Papa Archeron is guilty of neglecting all his children.
Was Nesta mean? Yes, sometimes. Annoying? Yeah. What she was not, was responsible for Feyre's needs.
People love to pull the "As an older sister, I have problems with Nesta" so I'll share my experiences.
I have 3 younger siblings. One is close in age to me, about 2 years younger. I am not responsible for her needs. Our parents may ask me to advise or share my experiences with her as an older sibling with more experience, but she is, ultimately, my parents' responsibility until she is independent. I cannot neglect her in the legal sense.
My 2 youngest siblings are 8 and 11 years younger than me, respectively. I am still not responsible for them. A larger age gap does not make me their parent. When I'm at home, I may be asked to drive them somewhere or cook them a meal if our parents are out, but ultimately they are my parents' responsibility. I may agree to take on some responsibility of them temporarily but it's just that: willing and temporary.
Have I been mean to my siblings? Yes. Annoying? Definitely. But since I am not their parent, I am unable to neglect them.
And so, since we're so fond of forcing real-world standards on acotar, Nesta is unable to neglect her sisters.
