Nice idea. Of course, if you post this in Loving Wives, the only real outcome is that the husband walks out the store, leaving his wife to be gang raped by all the horny guys. So I'd suggest posting it in Exhibitionist & Voyeur !
Going completely the other, just to define the end points...
When the first guy gives her something to try on with its sheer top, hubby grabs one of the previous out fits he had her try on. She comes out with the sheer top, showing all the guys her boobs. Hubby holds up the outfit in his hand and says, "Not that one, Kathy. We're buying this one. Get dressed, lets go!" The other guys now know she's not a model, she's somebody's wife. The wife is embarrassed as she gets dressed, leaves the store with hubby, and fucks him silly when they get home, hoping he'll forgive and forget.
Write it somewhere in the middle and you'll have a winner of a story.
Jenny