Yes you (if an heir) should have been notified. Do you know if her estate was probated? If so, pull the probate file and see what happened to it. An attorney can help you with this.
You didn't state if she had passed away. If she is under a probate court conservatorship, then yes you should have been notified. If she had passed, then you would need to be notified if there was a probate court proceeding needing notification.
So long as you are an heir, you should have been notified. You should consult with local counsel for further guidance based on an in-depth review of the facts.
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