I thought the same thing when I read the “Denise smiled” comment.
Also agree about Jayme appearing shy in photos. Along with the photographic evidence Jayme has been described as being shy in quite a few references.
Truly I wouldn’t be surprised at all if this does turn out to be some person she “met” online in a chat room who deceived her. Predators capitalize on shy and inexperienced young people. Was she rather sheltered, as only children often are?
Has it been reported anywhere that she had close girlfriends her age? I know she participated in dance and cross country, but did she have a friend or friends who hung out with her? Or was she perhaps lonely at times and spent time online seeking social interaction? Yes, they were a close family and extended family but did she have close girl friends too, which is very different than hanging out with family and caregiver.
My own opinions.