-most women wear bras. Yes, even when they are trying to dress sexy. Because bras make boobs look perkier and rounder, which is something men apparently find sexy, so being a seductress or femme fatale is not an automatic reason for a female character to not be wearing a bra.
-a good bra will hide headlights, or at the very least drastically reduce their noticeability. A women with enough pointy nipple issues will opt for a padded or molded bra to hide them.
-women’s nipples do not automatically become hard pyramids visible through any and all layers of clothing the second they become even slightly aroused. They are not the female equivalent of boners. And even if their nipples do get hard, the bras they are almost certainly wearing (because even a goddamn succubus with big, honkin’ knockers for seducing men is gonna have those painful puppies in some kind of boob sling) should keep those pointy nipples from being visible to every other character in the scene, JIM BUTCHER. YES, EVEN LARA RAITH WOULD WEAR A BRA ONCE IN A GODDAMN WHILE.