First off, how exciting that you’re going on your first cruise! Oceania is known for great experiences, and you’ll love the journey.
I totally get your concern about seating. I had a similar situation when I booked a flight to Italy. My partner has a bit of a flying phobia too, so sitting together was a must. I found that calling the airline directly helped a lot. They can often accommodate special requests, especially when it’s a concern like yours.
Also, if you’re considering it, business class can be a fantastic way to ease the flying experience. The extra space and comfort might help your wife feel more relaxed. Just keep checking the airline’s website for seat selection; things can change last minute.