Carnival is near and my ltr of 8 months asked me to order this costume for her -> http://imgur.com/a/Eq9fR

I won´t pay for it ofc.I told her my GF won´t dress like a slut on that event.She replied something like "Well,then my friend XX will order it for me" i told her "Then she better orders you a new boyfriend with it".

Short silence before i tell her we will look for something together.

Is it really that common for women to dress like sluts on halloween or carnival?