Who is Maria Reiter from Hitler and what is their importance?

Maria Reiter was a young girl who met Hitler while he is in the country on something of a holiday. He began to spend a great deal of time with her and she apparently fell in love with him. Maria seemed to have built up something of a fantasy relationship with Hitler and was devastated when Hitler did not return her affections. She tried to commit suicide by hanging herself but was found before she could complete the deed.