The 3 day upgrae is not a guarantee. Continental *may* or *may not* choose to release upgrades at 5,3,1 days......sometimes one or the other. It is a revenue management decision process that can not be predicted.
You will still be eligible to go on the UG list when you check in online at T-24hrs. You can add your wife as a companion at the airport.
As a gold I have very rarely been upgraded three days out (twice). But don't lost hope...you still have a decent shot!