I was going to say "storm in a teacup" but we've run out of tea bags so that's a non-starter...

Honestly, its a short flight and you'll both be asleep so unless one of you needs assistance, I think it's better for your future peace of mind to accept that during flight changes and irrops, sometimes just getting a seat in the cabin you paid for is a win.

OH and I travel in separate cabins almost every time we fly together but we still both arrive at the same place and at the same time....

Better luck next trip