Lois covering for Clark? Its what people in a deeply committed relationship do for each other. By Lois telling Clark what to say to Henderson's man she is quietly informing him that, I know and I understand. One of her greatest talents is taking an initiative leap with a handful of facts and reaching a logical conclusion. Its perfectly understandable that Clark is terrified, this secret if exposed will destroy his life and family. It will take nerves of steel indeed to tell the woman he loves everything.