Sometimes we can open our mouths then later regret the information we've given.

A similar thing happened to me many years ago. An ex friend (note the ex) worked for UK Inland Revenue (taxation). Thought I would help my now ex by asking her a question about his tax. Did it hypothetically and got the answer he wanted. Wasn't obvious that she'd worked out who it was.

Forward to about eight months later. She admitted that she'd looked up the tax affairs of another friend's husband. Then proceeded to tell me she thought there was a tax dodge going on. He worked in a bank but not sure if this was linked. Bottom line was she didn't like him so was trying to find "something on him".

Finally severed the friendship couple of years later. Different reason, but that's when the other events began to resonate. As the saying goes "you have two ears but only one mouth, use it wisely".