Your not crazy.

I am a woman, I have to loose a few pounds, lol, I put on weight at my desk job. But for the majority of my life, I had a body I was proud of. Loved it, great natural chest, hips, a nice natural bubble butt I didn't have to work for. :) (Youth really is wasted on the young, lol, I would kill for my old body I didn't have to work for)

I had a dress code though. If I wore something low cut, my legs would be covered up. If I wore shorts or a short dress/skirt, my top half would be covered up. Family events or events with kids present, no cleavage, and dress couldn't be too short.

Your GF is proud of her new body, but she is being crass. You can show off your body without actually 'showing off your body.' I would wear fitted stuff. So a dress down to my knee's but hugged my body just right. There is a way to to it tactfully. Or a dress that was short, but dark black tights underneath.

You are not crazy. Crop tops at most work places are inappropriate. Her dress at the wedding sounds inappropriate, and her body paint at the kids Halloween party is DEFF wrong.