When he stepped into her arms, Sarah Jane squeezed him tightly, shutting her eyes in relief that it really was Luke and not some sort of trick. Now that she'd seen the Management's handwriting and remembered it for what it was, she didn't trust them not to use emotional relationships against them. But no, this was Luke, in the flesh, hugging her right back. She let go when he started to pull away, giving him another once over, just to make sure he really was in one piece.
She had to choke back a laugh when he started to apologize for not expecting their current predicament. "How could you?" she asked. "None of us could have expected we'd be here." She almost said 'again', but Luke wasn't here before. There had been a boy that reminded her a bit of him - the face swam to the front of her mind - but not Luke himself, thank goodness.
She smiled at him, forcing her thoughts back to the present, to the current predicament. "Yes, I'm fine. All in one piece." His confidence sounded much like what she'd said to the Doctor not too long ago. Except, Luke didn't know what she knew about this place, and so his was actual confidence, not bravado designed to hide insecurities. "Of course we will," she said, pulling him toward her again and clapping him on the arm. "All these brilliant inquisitive minds here? All these people who have innate curiosity and a desire to get home? Won't be long at all." She really hoped Luke couldn't hear the uncertainty behind those words.
When he asked her about before, she nodded. "I have. As to what it is...I'm not entirely sure." She wouldn't sugar-coat the situation, not for Luke. Keeping spirits up with false confidence was very different to hiding relevant information. "I remember the name of this place, and I remember some of the other prisoners," because that's what they were, no reason to deny it, "and how I felt about them, but not much beyond that. I'm not even sure how long ago I was here. It was after the Daleks...." She remembered now, talking about it, having to hide certain things from Rose and the Doctor, because they hadn't happened yet. And, she realized, that was still the case. "But I think before Rani moved in. I'm not entirely sure." Luke had mentioned Rani when he asked about their friends, so she knew he was at least from within a certain range of time. But she couldn't even be certain that the two of them were from the same point in time.
"Luke, what's the last thing you remember from home? The last major thing that happened to us?" she asked. If it was something she didn't know about, well, she'd deal. She had more experience with time-streams and such than he did. And she'd find a way to talk to Jack about it all later. Because, aside from the Doctor, he was the closest to an expert on such things here. And since the Doctor didn't remember, and was possibly earlier than before, she couldn't very well ask him.