Would you want to know if, after 25 years, your spouse's crazy ex made contact again?

It's been 24½ years since I told my ex from hell (https://similarworlds.com/4184835-I-Had-a-Relationship-With-a-Crazy-Person/1405508-My-Ex-From-Hell-I-think-sometimes-its-very) to leave me alone forever and all times. It's been 24¼ years since a cop convinced me that a restraining order was unnecessary, since he got through to her just how thin the ice she was skating on was. She just messaged me on Facebook. I didn't read the whole message, just the summary that the app gives without you opening it. She begins by hoping I forgave her for what she put me through. The last time she sought my forgiveness, it was to get me back, and it ended with the police getting involved. I doubt her sincerity.
Forgiveness isn't the issue. But that chick is crazy and with the misery she inflicted on me, I just don't want anything to do with her! I'm wondering if I should inform my wife. She knows about my ex from hell, but hasn't indicated much interest or insecurity over my past relationships, (she never had any herself) but I don't see what good it would do to tell her. This is how I'm thinking of handling it:
1. Pretend I haven't seen it for a week or so. This means not opening it, since I think the sender would be able to tell.
2. Open the message.
3. Copy the message in case I need that restraining order.
4. Block her.
5. Wait several months.
6. Either tell my wife or continue leaving her in blissful ignorance.