If you live in an area that's insanely hot, a bikini top that's not too small (i.e. actually covers breasts and doesn't consist of tiny triangles) and a modest pair of shorts isn't really that bad. I have a pretty low bar for being disgusted by sluttiness, and I would still let that slide in 40-plus weather. Not much worse than a guy in a pair of shorts and an A-shirt, except women get to show their belly button without looking gay. It's just that this outfit is on HER.