Login to continental.com, have an itinerary which you can see the summary for on the front page. Click on "View". It prompts me for my OnePass number and PIN (I assume for some sort of security reasons). If I enter my wife's OnePass number and PIN (or I assume any valid one), it logs me into my wife's account, but shows me all of the details of my flight. I also assume it would allow me to make changes or cancel the flight.

Personally, I'm not sure that it needs to prompt you for the OP# & PIN, but someone decided that it needs to for security reasons. Whatever these reasons are, they are defeated by the fact that you can enter any valid OP# & PIN and manage the reservation.

Sorry if this has been covered...I didn't see it.