Grandparents. Envy realizes that at one point, he probably did have grandparents. Technically. Although they were long-since dead by the time he'd been born, more than likely.
Although sadly, he's starting to realize, now that he's actually thinking about the whole 'parents and family' thing, that he's... been fucking talking about it. Oh balls.
His expression closes off a bit. "I think the old bitch might've spawned right outta hell directly, but I can't prove it," he says.