What happened on the surface?

[Because that's news to her, and as concerned as she is with their current situation, this sounds like something she needs to be caught up on.]

I appreciate your reassurance, [Because clearly that's what that was intended to be, right? Well, it's how she's taking it.] but you'll understand if I think it's best to treat his threats with the seriousness they deserve.

[She pauses, before continuing on with her explanation.]

You weren't there, Ben. You didn't see the look in his eyes, and just how much damage his emotions were doing.