To my dismay, I learned she had diabetes.
You didn't know about it before?
She kept it a secret from me and hid it.
I'm sorry to hear she had diabetes. I hope her hiding it didn't keep her from taking care of her health.
Yes, but it was a wake up call. I want her to feel bad for it now because she hid this from me.
I understand you're frustrated about it, but I believe now is a time for compassion and understanding rather than revenge. She already made her mistakes and is paying for it, so wouldn't you want her to get better now and help her learn to get healthy?