You can't email anything over 2.9mb with a blackberry, they're good like that.
To send with bluetooth. Your wife has to go to the media folder, press the blackberry button and select receive using bluetooth for the transfer to work. Then you pick the file, select send over bluetooth and select your wife's phone as the recipient. Even after that though, chances are it wornt work either. Berries are good like that...
Posted from my CrackBerry at wapforums.crackberry.com