Onedrive sync problem on Windows 8

Hi,

Hope I'm posting it in the correct forum.

I'm trying to sync between 2 computers, both running Windows 8.
The first is my computer, and the second belongs to my wife.

In my computer within the "documents" folder, there is a folder called "my wife".
That folder is the actual "documents" folder of my wife's computer.

I want to sync ONLY that specific folder between her computer and mine, using Onedrive sync.
So the result would be that she will have only her "documents" folder, I'll have mine, but I would have a synced folder of her documents.

Until now, her computer was running Windows 7, so I installed Onedrive there, and all was running perfect.

Now with Windows 8, I was enforced to register and log her into her own MS/Onedrive account, so I don't know how can I sync with both accounts.
This is Windows 8 limitation, that why I posted that here.

Hope I well explained myself.

Many thanks for your advise.