Real estate agents saying they have multiple offers

[Tricia Watts]

How far can I push in a professional way to ask an agent to prove they have multiple offers? I put in a rEALLY good but the listing agent is saying that they have multiple “slightly” higher offers. I don’t really believe this agent for some reason. Can agents say they have offers but really don’t? I know it’s unethical to do that but what if they do?