When you say you cheated did you use the cheat console without touching the flag console? Or did you do other types of cheating like save editing or messing with the flag console?
Also when you say attris to max do you mean your characters stats (body, mind and charisma) or the girls stats (love, arousal)?
If you cheated using the flag console or other means, like save editing to raise the girl stats then there's your problem. The game was designed in such a way that besides the cheats on the cheat console all other methods might break the game. Also, the flag console is only there to fix bugs that may occur when playing and should never be touched unless someone who tests the game like larry5168 tells you to (on this thread or the main one after explaining your problem).
Here's the save file that would repeat the problem.
Note: version v0.8.6; cheat console used to add $, blood, mind, charisma and to lock the hunger/pressure/... status (would those cause the problem? 'Cause I had to wait outside Claire's bedroom day after day trying to trigger the event).
I did not touch the flag console; however I did unlock all memories. (Perhaps I shouldn't have done that?)
As you can see, there're 6 'kisses' from Claire, 5 from drink+massage and 1 from peeping during shower.
And that's it; cannot trigger eavesdrop.
Can you help to me to have a look? Thanks!