Looking for a specific story

Not sure where i read it, but it im trying to find it again and havent been able to. Its in the form of letters from the wive/lover to the husband, who is an engineer, contractor or something like that and has been relocated for a few months somewhere else. Its kind of like an exchange program, so this african guy takes his place at his house and eventually takes his wife. Its told through the hubbys perspective as he recieves letters from them both on the situation.

If anybody knows what story it is or where it can be found, i would be very grateful!

I know the story and I've got it somewhere. I'll look for it and post it when I find it.

Is this the one you're looking for.
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It is. Thank you very much, thought id never find it