"Aw, I'm so sorry to hear that, sweet..." Rhonda murmured softly, reaching to stroke the poor boy's sad little face, as he made his divulgence of the Big Secret he was holding onto. "I mean, honestly - I don't even know what 9/11 is, or.... even what building you're talking about - but, well. That's so bloody sad, that is...!"
And then, of course, her own grimace only deepened as Oskar's hope seemed to soar upon wings... "Oh, I'm so sorry, kiddo, but... Well, Sirius Black was actually from my home world, as in - not on this island...!" She turned a little pale as she considered the idea of where Sirius was now, in 2013; even Alive still? Could be, but... more likely not, given his recklessness and such traits as went along with that... "In fact, I don't even know if he's still alive in this time..." she admitted, low and slow, as if revealing her own secret. "I mean, we're from 1982, ourselves!"
And now she reached across to touch Oskar's face again, as if she could draw some comfort from comforting (or attempting to, at least!) the young boy....