Your son was probably bothering her. I noted the address and called the police to file a complaint. The officer asked if I saw it happen. I was angry that this seemed not to bother anyone. No, I don't think my son saw a mirage.
Mirages are of pleasant things.
A 90-year old women turned flasher, is not on the top ten list of fantasies. The officer advised me to watch my mouth. I decided to go visit the woman and try to talk to her. I rang her bell. The landlady answered again.