If your wife dresses like this for an evening out, then she intends to start off on your arm, but end up being gang-fucked and filmed in the car park. Similarly, if you take her out dressed like this and then at some stage in the evening you can't find her for a while, you can be sure she will be sucking off a bunch of strangers somewhere, or tit-fucking some guy in the toilet.
It's important to be realistic about these things and have your eyes open.