I wonder if a 'neutral' meeting spot that would be considered safe by Charity would be more appealing to her. What if you asked her to scoop the kitten the next time she sees it and then meets you at a police station parking lot or an animal control facility. That way she would hopefully feel safe.

It does sound fishy and her safety and her neighbour's safety seem to be her biggest issue so it would be interesting to see what she would say if you suggested this. But I think I read somewhere in your thread that she doesn't want to just 'take' the cat so that might not work.