17 y/o French girl. I am loyal to my beloved Sansa. And Margaery. And Myrcella. And all the women of Westeros & Essos.
Also, admirer of the Napoleon of crime and her Waterloo.
Plus a lot of other things I'm too lazy to write down.
Ned: Sansa will be married to Joffrey someday. She cannot betray him. She must take his side even when he’s wrong.
arya understands that sansa is put on a terrible trajectory toward marrying a complete sociopath, and that sansa is put on this trajectory by her own family (and because sansa doesn’t know the full extent of joffrey’s awfulness because she assumes the world is/should be like what she heard in stories and songs). and i think arya’s gut reaction is so critical… arya sees things plainly, because she is a child and because she is not politically-minded. her question cuts to the heart of the matter: why are the starks putting sansa in danger like this?
so really, when sansa “betrays her family”… the starks sort of betray her first. They leave her in the position where she is expected to choose her future husband over her family, even to the point where her own father expects her to make this choice.