It. is. happening.
I was confident that if Eliza was to adopt a southern accent it wouldn't happen until she was enrolled in school, surrounded by friends who shared the same thick twang. Even then, with the influence of her western parental unit, I doubted its emergence.
Today, I stand corrected. In fact, it was my Mother who first picked up on it while staying at her house over the holidays. In her vocabulary, the words: "here, where, care, dear, bear" carry the Southern influence the most.
I present, the evidence. It really 'gets good' at the 1:20 mark when she starts to sing.