I've already grieved my mom's death. Even though she's okay.
Why are you grieving her death before her time?
She is getting older and I figured it may help to prepare for her death.
The grief process is rough.  I understand why you would want to try to deal with some of it now.
I know, I'm just a little worried about how I'll react when she really passes.
If this is how you're preparing yourself for your mom's death it's ok but try to make most of the time you've with her.