Lily let out a shocked breath, guilt heavy in the pit of her stomach. "No, I didn't know. That's awful." She shuddered. "But that's what I mean. The old Sirius would just treat everything like a joke. Now he has this whole life I don't know about, I don't know when I'm stepping on landmines. Not to mention Harry... it'll probably take me years to figure out what he's been through."