Because your wife likes western fashions, it doesn't make her any more likely to have an affair than any other woman. Try reading the numerous entries in our archives, and you will see that those who have affairs come from all social classes, and are both liberal and conservative in outlook.
Your wife wants to be a modern girl, just like billions of girls around the world. She wants to step away from a world where men decide how she behaves, what she wears, what she does, where she goes....... You can look at this with pride, as she's a strong and determined free spirit, who has seen the man she hopes can understand her, love her, and support her in her wish to be an equal partner in a marriage she wanted, not that was forced on her. So what if other guys look at her, all that tells you is that they envy you, and its a reflection of your good choice of a life partner; they just wish.... You are the man she gets in bed with and shares her dreams with, they just wish..... You are the man who will father her babies, they just wish..... You are the man she laughs and cries with, shares her secrets with, they just wish.....
Nobody knows the future, but if you give her the love and happiness she hopes for, if you let her continue to be full of fun and confidence, and if you grow with her, you'll stand a better chance than most people of having a long and happy future together. Keep having FUN together, and yes, enjoy travelling whenever you both can get away together.
Very best wishes for a long and happy, loving marriage.