You might be thinking of the moment shortly after Donna Troy's death when Dick's as mopey as he's ever been. A full-page panel shows him and Kory in bed, obviously just having had sex (condom wrappers on the floor), and it's still not helping. But I don't think anyone intrudes except us readers and the reality that Donna is still dead.
Given that psychological hit, not to mention all the stuff that had been happening in Nightwing, I could see Dick trying to get back to the happy relationship Marv Wolfman depicted here and in earlier Titans stories. And clearly Kory is still carrying a torch for him.
Then again, Dick might have gone back to Kory's bed several times, whenever he felt down.