Shoud i let her go out like this???

Hell yes! 

Well I hope!!

U should...she will be turning headss

Absolutely! 

Hell, she might even be a little overdressed. 

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I'd like to hear her reply to your telling her to "stay in".  Does "F-ck off, you asshole" come to mind? 

Absolutely, that should be the mandatory dress code for her (maybe a bit shorter jacket)

100% PM me and I'll mic over here and her now

Let?

hell yea