Hi Catherine, you will need to post two more messages to this thread. After that you can send a Private Message to Chloe, which will go to her through her email address, and hopefully you will get a response from that! So just reply to this message of mine, twice! Then you will have your three messages posted, and can access the Send Private Message button on any of Chloe's posts.
With having such a connection, it's a shame if you can't contact her, I'm sure she will be delighted to hear from you. The only snag I can see is if she has changed her email address from that originally given, as you say it's an old post? But - nothing ventured, nothing gained, so certainly give it a shot!
Just checked her profile, she hasn't actually signed in since 2012, but still reply to this 2 more times and then give the PM message a try anyway! If she has her notifications turned on for replies, she should also get emails re these posts, again that's if her email hasn't been changed, and if she hasn't entered the change. Hope that makes sense!
I have also sent her a PM, telling her she has a Visitor!
Good luck
Jeanne😄