I love your Slughorn voice. It feels just right. It's lovely to think that such a love story was blossoming just when Harry was at his lowest and the Wizarding World was entering its darkest phase.
Your 'warning signs' were a lovely tease. The hints at Slughorn's and Irma's past love lives were amusing and tantalising and their relationship was very well built. The relationship which you showed best of all, though, I think, was between Dumbledore and Slughorn. The funeral was a wonderful, original device. This whole story is just fantastic!