Yeah, uhm... Last time I checked, we're human. Humans just happen to reproduce sexually. It would be pretty silly, from an evolutionary standpoint, if we were so afraid of sex that we didn't dare even draw a figure which, god forbid, might be slightly attractive. Fortunately for the Human race, we're not all Puritans.
That said, this is a pretty miserable excuse for sexualization. It's a skin tight suit, granted, and she's in a pose clearly intended to show off her curves, but that's neither new nor uncommon in science fiction. All of her skin is covered. She has fairly modest proportions. I'm not seeing any attention drawn to any secondary sexual characteristics. And if you think those are big breasts, I wanna know who's breasts you've been looking at. Because those are pretty damn modest.
There's really no need to get so butthurt about this. You really think going around deviantART, home of depraved furry porn, gay slash fiction, and depraved gay furry slash fiction, and telling people that they need to draw tits a certain size is going to accomplish anything? There are much better things to be pissed off at, like obvious plastic surgery, priuses, hipsters and single ply toilet paper. Do something better with your time! Go egg houses, smoke a blunt, build the most comprehensive collection of Bud Light cans from very era imaginable.
Sexualization isn't the end of the world, this is a pretty miserable example of it, put some ointment on your butthurt and go outside.