When my wife and I first married we decided that our kids would not be allowed to have TV’s in their bedrooms. We recently bought a new house and our now teenage son has been asking for a TV for his room.
We discussed it and I still feel very strongly about him not having one in his room. We have 3 other TV’s in the house. He doesn’t need to be holed up in his room 24 hours a day. A few days ago, while I was working, he asked my wife if he could take a TV up to his room that we had, that wasn’t hooked up because it didn’t work very well. She let him and no one ever said anything to me about it, after multiple discussions on the topic.
I saw it yesterday and told my wife I was not happy about it. I didn’t go off or blow my lid but I am pissed about it. And now I am being treated like I’m an ass for being upset about it. Am I wrong for being mad? I feel like she undermined me on something I felt very strongly about even though “the TV barely works, what’s the big deal?”
LemonVibe 
You have every right to be upset. Being married and raising children is not easy and if one parent undermines the other it sends a message to the children that what you cannot get from one parent, you can get from the other. Your wife must be respectful of your parenting style if it is going to work. Time to have a serious discussion with your wife. Best of luck!
I think since you feel very strongly about it and they do not and don’t see the issue, that it’s time for family counseling for all of you. You’re communications are breaking down and now it’s no longer about the TV.