I have tried everything but beating the living daylights out of her. Somehow, her ability to talk is not getting triggered. I mean, in the Xbox version, if I recall correctly, if I'm not within "aggro" range (if you'll pardon the MMO term), as she walks around, occasionally she'll have something to say to someone, sing, and do other such idle spoken actions. She's not even doing *that* in TLC for me.
Edit: as for "not being scary enough"... trying that... will update this post afterward.
Edit 2 : *sigh* Welp, something just occured to me. I had never finished the quest to get her necklace.... I ended up marrying her anyways, by giving her the letter from the cellar, and defeating Thunder. So, after that, all she does is... well... giggle.
But! I noticed that getting as scary as possible causes her to bounce between two emotes ("hee hee hee" and "oooh").
Edit 3 : Even after beating the daylights out of her, she shakes her fist at me, and still makes no sound. Though... I wonder... the guard says "The Mayor seems strangely subdued lately. What did you say to her?". Kind of makes me wonder if that's all she *can* do, like, out of fear of reprisal...
In any case, thanks for the help, and pointing me in the right direction.