I need some advice on marriage?

My wife and I met last year in a bar, dated for a short time and got married. Both our families begged us to wait and get to know each other better. Now when she goes out of town for work, she ends up going out to bars and goes dancing. I trust her but when we talk about this subject, she gets really defensive. I have a problem with her putting herself in a probable predicament when something might happen. But to her its not a big deal. I need help on this matter. I really love her but feel like backing away emotionally and just letting her go out to bars with her friends when she is home so I don’t get hurt. Thanks.