Fallout 4 - Darla Wanders the Commonwealth

This one is weird. Now, my nephew had just done the 'get nick valentine' mission on another account on the same PS4; he signs out, I sign in on my account and start playing Fallout 4, and this is what I see when I'm scavving around finch farm. I hadn't even done the mission to get nick yet. It's like they had it buffered in the system and it played out as a random encounter anyways.