Why would a woman ghost me after she was the one who pursued me?

Girl I worked with 15 years ago saw me on a dating app and she stopped by work. (Same place) we both worked at. She asked for my number and wanted to get a coffee sometime. We texted for about a day and a half. I asked her what day works for coffee she said Thursday? I suggested a time in the afternoon she said that’s too late I have my son. (Her son is 4 years old) I get it a single mom with a young kid doesn’t have a lot of free time l. That was the last time she messaged me. I understand she probably moved on or is busy but i just curious why a girl would stop messaging even after she approached me and seemed interested. I sent 2 messages as follow ups and nothing so im dropping it but just wanted to get some insight from people.

I haven’t sent her a text since Sunday morning. I’m waiting to see if she responds but I know it’s 100% chance she won’t.

Why would a woman ghost me after she was the one who pursued me?
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