Lead somebody up the garden path - Idioms by The Free Dictionary
lead somebody up the garden path
lead (one) up the garden path
To mislead or deceive someone. Don't lead me up the garden path—tell me what is really going on here.
lead somebody up the garden ˈpath (informal) cause somebody to believe something that is not true; deceive somebody: I think you’re just leading us up the garden path — now, come on, tell us the truth! ♢ He had led her up the garden path, telling her he wasn’t married.