Originally Posted by
gfunkdave
You could always ask the gate agent very nicely if it would be possible for you two to sit together. This has worked exactly once in my experience: on a nearly-empty Aer Lingus flight about 10 years ago, my dad asked if I could sit with him and the GA handwrote a business class boarding pass for me. Dad and I still mention it to this day, sometimes.
There will be zero chance of the gate agent even if asked nicely of moving the OP's GF to CW and the 2 of them sitting together unless there is a genuine operational reason for doing so i.e an oversold cabin and a direct WT to CW upgrade would be rare I think.
OP, if you want to swap seats and you should be able too, get it sorted if you can before you board the flight.