She's looking for attention that you're not giving her, imho. Ask her to wear those outfits for you, do some role playing at home. Lavish attention on her when she wears stuff like that. I assume this is a new thing, and most likely, if she's seeking attention, she's tried to ask you for it in other ways but you're not listening. Embrace it, and eventually you can make her dress like a hooker only for you. This way, you both get what you want.
And as a PP said, yeah, stop talking shit about your wife on a public forum. Forget unprofessional, that's just dishonorable.