Your mother shouldn’t be mean and disrespectful to you. Saying that parents sometimes have worries and fears about their children’s (of any age) safety and well-being that are somewhat irrational or unfounded. Unless one is a parent it’s just hard to comprehend. It’s normal and I’ve never met a parent (unless completely negligent) who didn’t have worries that are somewhat irrational. Comes with the territory

As about bras...There is no law about wearing or not wearing bras. Whatever works for you. You can pretty much wear whatever as long as you extercise common sense and reason.

Probably a bad idea to dress up like a slob for work if your work has dress code (if you want to keep a job). And don’t show up to black tie event wearing pajama bottoms and stretched out tank top with no bra because bras and underwear are supposedly bad for your health and you believe being comfortable is the most important thing in the world.

Common sense is usually enough to figure out what’s appropriate.