It would have made sense if her father had had the same accent, but he didn't. Kids don't just develop wildly different accents from their parents for no reason. It comes from somewhere. For example: I had a bit of a Swedish accent in my child/teen/young adult years, but that's due to living with grandparents with Swedish accents. I just grew up hearing and saying certain words in certain ways, pervasive enough that one of my high school teachers picked up on it and one day asked me, "Are you Swedish?" He could tell because he'd once taught in a predominantly Swedish-speaking farming community in my province. Most people were completely fluent in English, of course, but their mother tongue was Swedish, and that's the community where my grandparents farmed for many years as well (not that this is why they had the accent to begin with, but it reinforced it). So I have to wonder what caused Deanna to be so out of step from her parents.