This is the first time I've spoken to her though apart from right at the start of the game?
Looks like you just found another bug in the 1.2 Fixed version. In past versions (v1.0 and 1.1 Fixed are the only ones I checked) if you maxed out your relationship with Daisy she will still continue to ask you the same rumors over and over but you won't get anything for doing it once the relationship is maxed.
It looks like the developer tried to put in a control to make her say 'Hey' once you finished building the relationship, but he goofed it up. Instead of having logic like this:
if relationship >= 15 then say 'Hey'
he is doing this:
if relationship >= 0 then say 'Hey'
This means you won't even be able to start the recess side quest with Daisy or build your relationship. Your only option is to use the cheat system that was implemented in this version by clicking on the lamp in your bedroom next to the PC. Then choose relationship -> complete recess quest -> daisy. The cheat password is 1640