When she found out about her sister's death, She almost broke down on her doorstop. She was smarter than that though, and waited until Vernon was at work to start sobbing.
Sure, Lily had warned her that she was in terrible danger and might not be around for much longer, but they were empty words. Right?
Petunia knew that that freakish magic could kill her in the end. She always suspected it.
They might not have been on speaking terms in the past few years, but Lily still loved her. Right? Right?
Then why did she leave her?
Why did she leave her like this?
Every year on the thirty-first of October, she had to dress Dudders up in various superman costumes. This might have been one of the hardest tasks she'd ever done, only second or third to looking into her nephew's eyes on that same day, or any day, for that matter.
She hated that man-Boldehort?
She resented him.
He not only took away her sister, but he took away her childhood.
She can't reminisce on the days spent with Lily because that led to when they departed, and when their loving relationship took a sour turn. And now she was dead.
Every time she looked back on her childhood, she yelled at herself.
How could she be so selfish?
So stupid?
How could she think about such trivial things as talent and abilities when Lily would be gone in a matter of years?
The same reason she hated her sister's killer was the same reason she hated the other one:
Severus.
He stole her away. If it wasn't for him, she would have never discovered magic (although she knew this was a delusion), and it never would have killed her.
But out of everything she hates, the boy doesn't fit in. Harry might have been one of Lily's last things that brought her happiness, and Petunia could never hate him to her very core. But she would protect him, something she didn't need Humblehore to tell her.
She hates magic the most.
Magic took away her perfect life with her sister.
It took away the boy and her family's chance for happiness.
And magic took Lily away.
She would never forgive magic, just for that.