Not being a windows expert (or any type of expert for that matter), but it sounds like you're all logging into the computer using the same user account. That's why LW's seeing you all as the one user & putting all the files in your wife's user account. Have you installed any new softw or done any OS updates recently that might have changed your login sequences?

When you are using LW see which preferences you're using. Go to Tools>Options>Saving & see where which user account it is.