I wouldn't report a "she said-he said" middleman report. I'd let it go.
Just to be clear, you didn't actually tell her "let's email back and forth a couple times so I know you're not a total psycho." Right? Or, say that to the middleman friend? Because who knows what he has said to her. If she heard that, she might have been offended. Like you're offended. Maybe the friend is stirring you both up.