Ever since Cathy found out about the hidden past between her mother and Vincent, she has never been able to live in peace. In her heart, she blamed her mother for making Vincent grew up abnormally. At the same time, she was grateful that Vincent was there by her mother's side so that Chloe could survive.
She blamed herself for feeling grateful towards Vincent, even though she knew that Vincent's bright life turned upside down because of her mother.
Not only that... now she realized something she had previously denied.
Cathy... kind of blamed Vincent for being a brat and fought with Chloe. She did not like the man's curse about her mother to Paul. If Vincent didn't argue with Chloe, if Vincent didn't make Chloe desperate to leave the house, Chloe would still be alive.
