Or rather I would say she did not remain with him voluntarily.
Why? Take a look at her in the picture of them in the store. Have you ever seen a teen girl who did not fix herself up for her boyfriend?
Her hair is lank, she is wearing no make-up and she is wearing clothes that conceal rather then reveal.
She is also not cuddling up to him.
Not the typical teen in love.
She changed the color of her hair and wore clothing that concealed her body to disguise herself. She had plenty of opportunities to yell out for help like when they were in the Walmart in Oklahoma but didn’t.
She was with him because she wanted to be.
In the Walmart pic, she did not looked distressed at all.