This may be a stretch but are there any spells that can help you realize if someone is being dishonest with you?
[charmed truth spell] - For those who want the truth revealed.
[caught you in my web] - This type of spell will let a person who had talked behind your back and told lies about you, tell the truth.
[eavesdropping spell] - Focus in on certain voice(s) in a crowded place.
[eye of truth spell] - With this spell no one will be able to lie or hide secrets from you.