The line in discussion came right when Nyx was talking about going through the Erynn portion of the update...
So i assumed it's with Erynn... maybe she's talking about something/someone else, but to me it still sounded like it was about Erynn.
Then
valbitterb said he expects Erynn's ex-BF Zane (who due to recent info, coming from his siter Brooke, we know enjoys surfing and hanging out at the beach) to show up at the beach while we are with Erynn...
Connecting the dots this led me thinking...
possibly a flashback to when they were together, perhaps including the sex scene...
This is something a few(maybe a lot) people would like to skip over.
But it's all speculation.