[As much as she's a talker, Steph is also perfectly capable of listening, so she sits and watches Jason as he explains himself, or his history, or whatever term is most appropriate. From what Tim told her of their earlier meeting, Jason didn't reveal a whole lot. She's not entirely sure why he's telling her, of all people, but maybe she's just an easy way to disseminate information without having to wade through emotional issues first.

God knows Jason has a lot of emotional issues with the other Bats.]

First of all, I'm super glad you're not planning on starting shit, 'cause this place sucks enough without having to deal with that mess. No offense.

[She's not sure if that could be taken as offensive, so she's covering her bases.]

Secondly, you're either from a different world or the future, and I really hope it's another world because Sionis is dead in mine and I'd like him to stay that way.

[That's the part that matters. She doesn't want to contemplate the idea that he could come back.]