The salty food was making her 'thirsty'.
a 'thirsty' child
(..) Do you love me? - Come on, go to bed. - Come on, say it. I love you. I love you, too. You've got a cat? Go get us some water, I'm thirsty. Come on. Come on. Well, I guess I know my place. I can't believe I'm actually doing this. "Get me water, bake me a cake"... What happened to "please"? (..)1990 The Godfather Part III