Great!
I picked the general idea of what was going to happen, though I had suspected the woman was working with him.
However, when Jack and Anita first saw them I felt like screaming at them. There was a very simple thing they could've done -- go up and say hello! After all, he'd just seen a friend. What would've been more natural than to go up and chat? Of course, that would have ruined everything, but while I was reading I felt it would have been the perfect solution....
The only flaw is an editorial one. When Jack referred to house number 86, I thought it was a deliberate mistake, because the house number was reported as number 82 earlier in the story. It quickly became obvious that one of the numbers was a typo and they should've been the same. However, that's a really minor point and doesn't mess up the story.
Very, very nice. Thanks, Tristan!