Barrellofart: The 'ey' part is the offensive part. It's diminutive.
Like, in Spanish, when you want to make something smaller, you change the suffix to 'ito' (For example, Gato, and Gatito - Cat and kitty), it works, essentially, the same in English.
Take names, for example: When you are younger, you are Johnny, or Davey, or Bobby... When you grow older, those names often change to their more 'mature' versions because you are no longer small, or cute. You are now John, or Dave, or Bob, even if they don't call you Johnathan or David.
Considering the status of women 'in a man's world', I wouldn't be surprised to find that women think the term 'Wifey' is offensive. I myself have always thought of it as a pejorative.
Now, is there a double standard with 'Hubby'? Perhaps, but I think when you get down to it, it's the difference in the perception between men and women, and how they (or rather, whether) they assess that as a threat.
thanks a lot for a very informative post..i guess thats her reason..