And even if he did, what are the odds Dukat would have waited that long to bring it up? I suppose maybe prior to the Occupation Arc he hadn't given up on Kira falling in love with him herself.
I love that the first step in Dukat's grand revenge on those who had wronged him post-Waltz was essentially to make an early morning "your mother" call to Kira.
Whatever the episode's flaws, that's quintessential Dukat.
(I like to think he had a checklist. "Now, about what I did to Captain Sisko's baseball...")