How long has Curly been married to his wife??

2 weeks, it is very abusive on Curley's part.

http://www.gradesaver.com/of-mice-and-men/q-and-a/how-long-has-curley-and-his-wife-been-married-49619/

Of course it is not healthy because Curley is not mentally or emotionally healthy. He hates everyone, mostly himself.