Co-worker a bit of an exhibitionist

I mentioned a while ago that I work in a male dominated industry.  There's only 4 women who work under my boss, and about 25 men.  One of the other women, I was hearing comments months ago when she was working alone with a guy in a team. One of the comments the guys had was that she doesn't wear a bra. 

I hadn't noticed it myself, I don't check out women's breasts as a rule, but I remember one day the shirt she was wearing was rather tight and she was cold and she had massive headlights. That's when I noticed she wasn't wearing a bra. I remember mentioning it to the gf who works with me and she commented, she'd been hearing about it from the guys for a while. Of course none of the guys would ever say it to her. 

Today this same woman is wearing a long white dress. She's not wearing a bra or a slip. When she walked away earlier pushing a trolley, you could see her underwear clear as day.  This white dress isn't leaving anything to the imagination and I can't help but imagine what if she left and it was raining. Can you say Wet-Tshirt? 

If you're going to wear a white dress, you'd be well advised to wear a slip. I learned this years ago. I have a short black slip that goes mid thigh and a short white slip of the same length. I do not wear any summer dress without putting one of the two slips underneath.  Then I don't need to worry if the dress becomes see through in certain lighting or out in the sun. I also don't have to worry too much if a gust of wind lifts my dress, since the slip is narrow and won't lift. So worse case scenario, you'll see my slip and not my ass if it's windy.