Oh we totally meant to use Thomas that way. Harry never got around to telling Molly Thomas was his brother (she figured it out after White Night, apparently, in a short story, but this only means that she had no knowledge and then no confirmation for a significant period of time!) so in plotbunny Molly totally mentions Harry's thing with Thomas and then watches everyone go "agh, no" and then they tell her why and she's like "AGH NO." But this hilarious thing is given Thomas forgot to mention he was Harry's brother for like three years, and was, lest we forget, an inexplicably helpful sex vampre--Harry did crush on him.
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