Wife too close to my brother
So my wife and I have been married for 5years now and we have in almost all respects a perfect marriage. A few months ago we moved in a few houses down to my brother (Married) and since then she has been growing extremely close to him. I usually don't get home until a couple of hours after my wife but my brother is so she normally goes over to his place now. They are now pretty much more than friends. They laugh, talk about everything. I get it they both have high powered jobs and similar pressures and interests but now they go out to movies together, have dinner and even when the whole family is together she is quite touchy. I know for sure there is no sexual activity but they do cuddle, hug and hold hands while alone together. They make no secret of how close they are at all. We had a party at my place where and when we all got into the hot tub, my wife got up close to him. My sister in law doesn't seem to care and has made no mention of anything to me. They are also both very happily married but she is away a lot. After the hot tub, my brother asked me if was uncomfortable and if he should stop being friends with my wife. I stupidly played it off cool but it does bother me, a lot. To mitigate this, I asked my wife if we could move to another town in the sense of new town new adventure, I also brought up the possibility of kids but this set her off saying I only care about myself and don't listen to her feelings.
I am feeling more and more pushed aside even though she hasn't changed towards me. I just don't know if I am being overzealous or should I be worried and should I bring it up if yes with which of them.