I don't refuse to believe it just because I love Grace. I mean yeah, she's always been one of my favorite characters, just because she's so incredible. But....I do have actual reasoning behind this.
First off, think back to the assassination letter that Grace wrote to Vladimir. Yes, she did write a letter authorizing the death of her husband. But I do NOT believe that it was simply because he wanted a divorce, like Beatrice claimed. Think about what she actually said. "He has become a threat to more than just the tranquility of my home." Obviously, there was more going on. Look back at Grace. Has she ever done anything crazy, anything that there wasn't a solid reason behind the decision? No, she hasn't.
But the one thing that I've always looked back on whenever anything has been said about Grace, the one moment that I've always thought of, was Irina. Remember how in books 4-6, Irina was always thinking about Grace? At one point, Irina thought, "When you called me a fool, there was kindness in your eyes." (I'm paraphrasing here, sorry. That's not the exact quote, but I'm currently watching The Princess Diaries for the 87th time and I don't want to go upstairs to get my book.) Anyways, so let's think about it. Irina had done many, many things that should cause Grace to hate her. Irina killed tons of people. She was responsible for lots of terrible things. When Grace's daughter died, Irina said, "These things happen." She said that to a woman whose daughter had just been killed. Yet, Grace was still always kind to Irina. You cannot tell me that the woman who supposedly killed her own husband just because he wanted a divorce would be kind to the woman who was partially responsible for the death of her daughter. I just don't believe it.
I'm really expecting an explanation of how Grace realized that Nathaniel was evil, and needed him killed. I just don't believe that Grace was evil. There's most likely going to be a big explanation of how, yet again, Grace was right.
Then again, it could be kind of interesting to see Grace having done something wrong. To see her as a fallible person like everyone else would definitely be interesting.
What do you think of Grace?