Hi,

Yours seats are near the back of the 777, and because the plane narrows, there are only 2 seats on either side of the centre seats, rather than the usual 3. Thus, it'll be just you and your wife, with noone else to climb over.

As for an upgrade, it's pretty unlikely unless you've got any status with Emirates. There will be Gold, Silver an Blue members who in theory will get priority in the event of Economy class being oversold. No harm in asking though :-)

For the DXB-MAU flights, make sure you get a window and aisle seat (the seating on the A330 is 2x4x2). I'd recommend 25A & B, or 25 J & K as these are the exit row.

Have a look at Seat Guru for further seat info.

Cheers,
Rick