Family problem

My wife thinks that my parents and sister behaves rudely with her. So she forced me not to attend my sister’s programs and also avoid my parents.

In respect of my parents I used to make her do some things which she did not like. (Example: my father wants my wife to serve guest when they visit. My wife does not want to do)

My mother and father one day scolded my wife and her parents because they did not like her activities like wearing western dress, cursing in bad language and many other. 

Thinking I should support my wife as I moved out of the house. Now my wife try to always cause hurt to my parents. ( example: whenever my parents sends food she returns it and does not allow me to even meet my family)

She threats me of suicide whenever I say something against her will

Please guide me