While not the same one time we were flying down to Rio for holidays to visit inlaws. We had booked and paid for bulkhead seats. We got on the plane towards the end of the boarding process and someone was seated in our seats. The adult told me we need these seats so I can take care of my daughter. I pointed out these were extra cost seats. I offered to change with her if she gave me 500 cash per seat(no checks). She got up and left and called me a p***k.