Listen, I've been married for almost three decades now, I wouldn't mind my wife to go on a vacation abroad with a longtime female friend that I know, and she wouldnмt mind me doing the same.
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She's going overseas with a relatively recent acquaitance, someone she knows very little about and that you have never seen (or just barely). To me, that would not be appropriate.
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To have a romantic weekend with some strange guys in a place like the italian seaside is very inappropriate, it would be unacceptable to me, to my wife and more or less to everyone I know...
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You should also consider the fact that the romantic weekend came up some time after she told you about the trip, that's a very bad sign.
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Two guys offering a nice we to a couple of hot ladies are thinking they have a goood chance to get laid, and will do everything they can to bed them, I can assure you. Unless they're gay, of course...
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