I've guessed that Anissa made a connection with Morgan and was happy that they both were into Slenderman, was happy that she made a new friend, shared a connection, shared interest, and it may have spiraled out of control from there.
Jeg tror at Anissa knyttet et bånd Morgan og var glad for at begge likte Slenderman. Hun var glad for sin nye venn. De hadde en felles interesse.