not sure where you live, what she does for a living or how your lifestyle is now, but life for the wife and kid in the CF can be both tough and very rewarding. I grew up as a base brat, my mother stayed home with me & my sisters. It was tough when dad was away, when we had to move, especially to some less desirable places, but I don't think mom would trade it for anything else.
She met the best friends she ever had in her life, saw more of Canada & the world than anyone she grew up with. Currently I have a girlfriend who is also apprehensive about the whole military thing. I am in the regs, and I do understand where she's coming from. If I am posted somewhere, she will have to give up her job to come with, that can bet tough. If I were to go overseas that would bother her greatly. The only thing I can suggest is what I have done, I take her out with me & my military friends. She has met and become great friends with my pals & their girlsfriends/wives. It helps I think if she sees & interacts with the human side of the military. She has sort of joined the family. I think your wife may also be dealing with fear of the unknown, we all deal with that now & then.
If she does have a job that is easily transferable that helps, nurse, teacher etc.. They need them everywhere. My girlfriend came with me to Oklahoma when I was posted there on exchange, she's a nurse, made more $$ than me there
. It hurt her more coming back to Canada that me
It really depends on your individual circumstances.....