He expected her to be able to think at a time like this? But she tried.

"Because he is a Jedi," she said slowly. "He had to be hidden or else he'd be killed. But I'm his sister! I deserved to know." She looked Ben straight in the eyes. "Were our parents Jedi? Is that what happened to them?" The timing made total sense; she'd been born right at the time Palpatine had declared them traitors of the former Republic.