Husband’s old female friend unsent a random message, after over a decade, what to think of this?

Anonymous
So I found an unsent Facebook message request that was from last week, and it was from my husband’s old friend/romantic interest from before we got together, who neither of us have talked to in like 13 years.

Backstory: before my husband and I started dating, he went on one date with this chick, and they hung out in groups afterwards a few more times. He was into her but she was trying to talk to other dudes so he felt like he was getting jerked around by her so it faded out but they occasionally still talked as they had several mutual friends. But eventually they lost touch.

Then he started dating me and of course, finding out their relationship, I realized she was someone to keep one eye on. About 2 years into our relationship, she added me on Facebook and I thought it was weird because we never formally met, but then I thought well maybe her and I shouldn’t be strangers. We chatted about work and our creative interests, found out we had things in common, like writing. I thought all was well. Then she blocked out of nowhere and sent me a message saying she felt I was copying her and we had too many similarities on our profile pages. I felt very accused like she was trying to paint me as a creepy stalker person, but then my husband told me she has schizophrenia. I was oh ok that explains it.

Another year later, she sent me a random shitty message that just said “have fun bowing” after I posted a message about being in a beauty pageant. Blocked me again.

Now, I got yet another random message from her out of nowhere but she unsent it. I don’t know what she said but neither my husband or I have spoken to get in literally over a decade.

I’m hesitant to say she’s jealous over my husband because she’s had the chance to be with him but she didn’t take it. And from what I understand, she’s moved on got married and had kids so I don’t know why she’s randomly back in my dms after all these years.
Updates
7 mo
You’d think someone our age would be too old for this nonsense but you’d be surprised how some people never seem to leave high school mentality.
Husband’s old female friend unsent a random message, after over a decade, what to think of this?
3 Opinion