Of course he'd go for the hard question. Sarah debated silently for several moments, weight her options. She'd made it a policy to tell him the truth when he asked her things, but she wasn't certain the feared end of all things was an answer she wanted to give right now. She wasn't even sure it was an answer she wanted to accept herself right now. This had to be some master plan of a villain – or several – meant to look like the Apocalypse. Though maybe she was just arguing that because she didn't want whatever was wrong with her to be anything that serious – that fatal.
But once the talk spread, the word 'Apocalypse' would get heard and she didn't want him to think she'd lied to him. Better to take the middle ground for right now, and make a solid decision later.
"The answer always seems to be because bad things happen, and here they happen a lot more often than everywhere else," she finally explained. "But that's why people all over the city, including all of us here, are working together to figure out how to stop what's going on and fix what's already happened. We've faced big obstacles before and figured them out. Did I tell you about when we all lost our voices?"
That was a safe enough story – with careful edits – to relate to what was going on right now.