ANSWER:

They have no right, none whatsoever over your wife and she should have her own room, washroom and kitchen that nobody enters without her permission and she must not be forced to sit with them and eat!

Be a man and protect and honor your wife as she is your responsibility and at the same time do not be disrespectful with your parents while dealing with these situations. 

Do not let them mix so that such situations would not happen.

 

My parents talk to my wife like they have authority on her.They try to control her in various matters.I explain them politely that they shouldn’t do it,they can speak nicely & she will listen,if she misbehaves or has mistakes,they should complain to me.They become very upset If I say this.Am I sinful?She is given separate accommodation though but she only eats with them.