Fair enough, if he were in her shoes he might reject that offer as well. It wasn't really made for her convenience, though, it was made to keep Jack from doing something they might both regret. Whatever that may be.

But when Jack speaks...

there's obviously a good amount of history here that Sinclair doesn't know about. That he won't know about, at least not right now. For now, he lets himself stand back and listen. He doesn't want to jump to any conclusions just yet.