That's true. Tone of voice trumps what is actually said, generally. It's hard to fake the nonverbal element of a verbal statement, particularly in a knee jerk reaction like that (sorry, my communication degree is at work here). My guess is that you caught her off-guard, and maybe she thought it was a bit cold to be kilted. I wouldn't call it a negative, necessarily - just different. Certainly spiced up both your days, though, I'd say.