I have a problem...

I am Executive Platinum with AA so I never have a problem with seating. However, a group of friends and I have booked a trip to Mexico that leaves this Saturday. I just received my flight info and I see that my wife and I have been separated on the flight from ATL to PVR. I called Delta and there is nothing that I can do.

Does anyone have any advice on how I can change my seats so that we are together??

Thank you all for any advice.