She was devastated when she found out that he didn't really love her, and had only been 'leading' her 'on'. [=he had been leading her to believe that he loved her]
It turned out that he had been 'leading a double life'. [=deceiving people about his life, not telling the whole truth about his life]
The judge made it quite clear that the lawyers were not permitted to ask witnesses 'leading questions'.
(..) DAVID: A new Terminator. It's like you said it would be. -It's worse. OLSEN: Conner, get your nose out of that. None of your business. You're not leading this mission. Alright, let's cut these sorry bastards loose. Come on. Let's go. -Jericho, come in. MAN : Watch that. OLSEN: (..)2009 Terminator Salvation