Ex-bestie gives birth and suddenly wants to rekindle friendship?

This is someone that I called out about 4 years ago for not being a true friend after being "sisters" for ~15 years where she continuously degraded me.

Someone who kept on sneering at my clothes, my hairstyle, my general way of life, who always had comments like "Should you really wear that?", "When did you last wash your hair?", and "You know what I think about those pants," (last one is a direct quote), and this was a 'friendship' where I for many years didn't realize my sole function was to make her feel better about her self by pointing out my "flaws" and reasoning it by "I'm only saying this because I care about you."

After finally realizing that this was a toxic relationship and calling her out, she have the same excuse, "I didn't mean it like that, I only say that because I care about you," and then proceeded to block me all over social media, even getting her mom to unfollow me after being more her child than my own parents. Good riddance, I haven't missed her since.

Then, out of nowhere, I get a long text from an unknown number signed off by her, where she tells me she's missed me during these years, that she apologizes for her behavior those years ago and that she didn't reach out earlier. She then proceeds to ask if we can try being friends again.

After some brief snooping on what she's been up to, I spy with my little eye that she's recently had a baby.

I brought this up with a friend who has a young child, and she mentioned that having a baby can make a person see their own flaws in a new light since they have to consider what to teach (another friend chimed in on this as well, telling me he realized how horribly he behaved as a kid himself), and I'm not going to argue that any of that isn't true. Do I think it's sad that it takes having a child to apologize for being an a-hole? Yes.

Could that mean that my ex-bestie has realized alongside becoming a parent that she treated me badly? Sure. Could it also mean that she's lonely (I was her only friend for a looong time) and now stuck with a baby, she wants someone back in her life? Absolutely. Is she just looking for a baby-sitter? Also likely.

It seems too much of a coincidence that this birth isn't related to her reaching out, and given how she used me as a way to feel more powerful, skinnier, prettier, and all that stuff, I find it even more strange that a child isn't the reason since she "regrets not reaching out sooner," whatever her reason for reaching out is.

I blocked her, obviously.

What would you think was the reason in a similar situation?