Not this time. I would cut off my left foot to stop this happening to your child. Fortunately, the law shares my passion on this.
Personally, I'd feel more comfortable if there was, at least, an encounter with a minor before the cops arrive. Goes to intent. The minor would be in on the sting.
In a prostitution sting, the prostitute needs to quote a price or suggest performing a sex act for money before the cops break out the handcuffs. In a child predator sting, there ought to first be a documented suggestion of sexual contact to a minor in their presence.