Extra CUSTOM menu attributes

Goodday,

I've got to make a template for a client, which uses an non-standard menu. It uses menu items that have an "title" and an "description". Like so:

Home
The homepage

About
More about us

Pretty
Just a pretty page

So what my problem is, is that I want our client to be able to fill in the descriptive field in the node screen. I've tried using Menu Attributes, but this module isn't flexible enough to let me configure my custom field and it doesn't supply you with an descriptive field. I know there is an descriptive field in the menu item edit, but I want my client not to have to go the menu edit and simply be able to edit it in the node edit screen...

Any solutions? I've noticed the menu items get returned as following:
Array
(
[menu-317] => Array
(
[attributes] => Array
(
[title] => test
)

[href] => node/5
[title] => test
)

)

I would like to have the [attributes] array contain the description field.

I thank you in advance...