I brought it up in my comment to her LJ, and this is her reply:
To me, and this was my intention and it may not have come out too clearly but here it is: Ezra wanted Ennis to say Jack's name. He wanted Ennis to admit it and not just say 'hey you ran into some guy in an alley that tried to do this to you' In the context of this conversation, it was important to Ezra for him to hear Ennis say his name NOW. Saying Jack now wasn't like saying Jack before or ever again. I really think Ezra saw it as an admission of what was going on.
I can understand that. Ennis is denying to Ezra and to himself that there is anything going on between him and Jack. But obviously Ezra knows because of the alley scene. I get the importance of Ennis saying it because he and Jack have been living in a kind of fantasy space up till now, meeting secretly in deserted stations, cinemas and trains, and alone in Jack's house...experiencing their relationship only out of this world, not in it. And by forcing Ennis to say Jack's name in front of him, and to have admitted his relationship with him, it has now been dragged into the real world. Where it needs to be really for Jack and Ennis to go any further.
Even with Jack Ennis has a tendency to almost accuse him of liking things that Ennis doesn't, but thankfully Jack sees through that, otherwise they wouldn't get anywhere at all.
Still confusing to read, though, I think.