I doubt it. If you have everything you need you don`t feel unhappy. The fact you feel unhappy shows that you don`t have everything you need,

But- you said its you wife - and what - you never had sex?
I think its not natural, and no there is no ballance. Normal couples DO HAVE sex. What about having childred? she never mentioned it?

I don`t know... it looks very strange to me. Your wife has a problem,,i t needs to be adressed and not ignored. I don`t see a reason not to ask her about it. Asking her about it doesn`t mean you HAVE to do it it even doesn`t mean conviicing her or anything - it just means simply asking. If you are afraid to get things out of balance - it may meanthis balance is not something stable. If you trust that she doesn`t react poorly - because you have such a wounderful relationship - them speak up....

If course, if you think this question can destroy your marrige or make a ****ing argumument or whatever - i don`t know - its not an advice - i don`t know about your wife and your marrige -you know better what to do.