Oho! So something eerie similar has happened in the past!
I clicked on a spoiler tag in the last chapter's discussions and was like "nope, that theory is just too far-fetched" but not that I've seen the diary entry, I can't get that theory out of my head. I mean, if this happens twice, it's probably not a coincidence. Also, who knows, it might've happened later. Again, and again.
Until we reach present day.
Great aunt seems like an awesome person. I hope they'll get some family time and our girl won't just spend her time burying her nose in old diaries. Great aunt seems to like the changes within her and seems to be delighted too see her. They're both so cute.