Describe Helen's relationship with her parents,throwing a light on her being possessive of her mother?

Helen loved her mother. She was possessive of her mother from the time of a baby.

I only know that I sat in my mother's lap or clung to her dress as she went about her household duties. My hands felt every object and observed every motion, and in this way I learned to know many things.

When Helen's little sister Mildred was born, she became even more possessive,

For a long time I regarded my little sister as an intruder. I knew that I had ceased to be my mother's only darling, and the thought filled me with jealousy. She sat in my mother's lap constantly, where I used to sit...