Devon had always felt that her father, David Lin, never saw her as his daughter. If anything, she always got this feeling that he only saw her as his competitor. So, as she grew up, she started embracing how her father looked at her. She would challenge him with every opportunity she got, and he eventually tossed her abroad.
All that came right after being thrown abroad created more distance between her and her father. She wasn't hopeful anymore to get an ounce of affection from her father — she gave that up long ago.
Still, after being a ghost, she couldn't help but wonder why David Lin hated her that much. Even Daryl, her good-for-nothing second brother, wasn't being treated as badly as her. Then she finally got her answer.