As in a separate letter from the application, or should she put it in the box at the bottom of the application where it asks "Is there any more information you wish to share to support your relationship?"That's fine. She needs to include a detailed letter of explanation explaining how you will support yourselves.
By the way, thank you so much for being so extremely helpful. You have actually made this process less stressful on us both and we greatly appreciate that because we have also been working like crazy to get our house ready to sell.