Wow, that was terrible what Deborah did, no man deserves to be treated like that.
But if I'm to be in your position I will forgive her not because she deserves it but because I deserve peace of mind and no amount of revenge can give me that.
I will move on, continue to work on myself, and be happy without her.
I'd forgiven her anyways, I know I am saying the impossible, I hold nothing against them anyways.