Renee does bring up a good point.
Maybe it was just a memory trigger. That sometimes happens when we see, feel, taste, smell or hear something that triggers a memory.
It is also possible that Rose does care for you and was waiting for that moment for that connection to make herself known. Whether she just popped in to say she cared or whether she moved along with you. Time will tell.
Hopefully she decided to finally move along.
You'll see her again no doubt.