Q:

Can we call someone X太太 or not?

Can we call someone X太太 ? or is it the calling of husband to his wife?  In my textbook everybody calls one women 錢太太. But my teacher said it is unsuitable. Which one is correct?

A:

In fact, you can call any women who has been married with "X太太"， it shows lots of respectation and manner. However, if you call your wife, usually we don't use X太太， it will make your wife unwell, just like a stranger.

A:

It is absolutely OK to call someone's wife "X太太"， alternatively, you can use "X夫人", which, in my opinion, is more polite and respectful(unnecessary in causal occasions, but often used in business and diplomacy occasions). 

A:

I am a native speaker born and living in northern China. In my experience of life, calling someone X太太 only appears in some old literatures (or maybe I am just too young and naive :) ). 
There are many differences in the calling conventions of one's wife in China. As far as I know, people tend to say “我媳妇” in northern China while “我老婆” in southern China (both are called only by the husband or very good friends). They are not Honorifics. 
If you meet a couple for the first time, you can say 嫂子 in northern China.
If you meet a stranger, you can say X女士. This is also can be used in written language. 
If you a among young people, never say X太太 or 太太. This makes others think you are too old-fashioned.

