I do agree that Libby did seem active, had a best friend in Abby and had other friends as well.
In my experience teaching 8th graders for 25 years, my opinion is that when girls are 14, even if they are confident and popular, they have a yearning to be considered pretty by boys. Abby had a boyfriend, and since Libby thought she was wanted by someone who looked like AShots, that is intoxicating to a girl that age if she hasn’t been frequently approached by the opposite sex.
I believe that Libby as well as her sister seemed very happy and well-adjusted living with their grandparents, but there may still be some ache for a growing girl whose father is not part of her daily life. More vulnerability to fall for a scam.
Separate from teaching, I’ve seen my eldest granddaughter go through some of this, because my daughter and her husband divorced early and thereafter the father was not very involved.
JMO and JME