She was never in a million years going to fit into the RF. it would have hit her like a ton of bricks once she had the ring on her finger and the dawning realisation of what was expected of her. One of the few times the RF really relax is at Balmoral. They mix with the locals, go to the village coffee shop (her Maj too) and go about their business and no-one bats an eyelid. They have a cottage on Balmoral estate where they hold family barbecues and it's across the path from a hiker's bothy (which is very nice btw) and it's not unknown for Sophie to invite hikers across to join them. Obviously there is close protection nearby but the only thing people are asked to do is not to take photos. Of course Archie was too small to make the trip to the cold, draughty castle in the back of beyond in the highlands, too much travelling so they took him to Africa instead.