Quote Originally Posted by RobDog888
Just tell her point blank - "You want to ___ __ __?" If she says yes then your in like Flynn but if she's offended then you may get a *SLAP*
I would go with RobDog's suggestion. Its painfully obvious she's not faithful and giggles with glee at the sight of you. Most people don't care enough what other people wear to voice their opinion about it to their face.

I would just add an invitation to the bar for some cold ones before executing Rob's suggestion.