There are many reasons for her not responding that have nothing to do with you. Her internet may be down. Someone in her family could be sick. Prhaps the email didnt go through -- that happens sometimes. Maybe she had somewhere she had to be. Perhaps her husband or another family member needed her. Maybe her electricity went off. Maybe she is sick. Maybe she was exhausted and went to bed early. Maybe she had to get a bunch of shopping done.
Try not to read so much into it. It likely is not what youre thinking.