"I think Greg would just play along with it. We can tell him, though- it makes sense somebody would know. And contrary to popular belief, Greg and I... have an understanding. Past Ray and I. He'd be offended if he didn't know ahead of time, and then he'd just ruin the joke out of spite." Their 'understanding' usually involved booze and a joint or two, but it was cathartic for both of them, and let Mark spend time with a man closer to his real father than he'd known in a long time. He'd take what he could get.