That's funny Leo. I'm likely in the minority but I always thought Thom/Moiraine is one of the more natural relationships in the series. I think I kinda rank it Thom/Moiraine, Perrin/Faile, Min/Rand.
"My dearest Thom" should have been your first clue...and the whole "words from my heart" thing. Both phrases, especially the second, hearken to more than just blood relations.