3. … while sifting through her bag.
When he was working on his second book, Warning Signs, DeLorenzo researched how body language can tip you off to a cheater. What he found: If she puts her hands in her pockets, touches her face, or pokes around in her purse for something, it’s a dead giveaway that she’s pulling one over on you. “They’re all signs of nervousness,” he says.