You were a servant in a kingdom full of giants. The king was 9ft tall. Everything in the palace was fit for someone his size. A little tough for a 5ft person to navigate.

You caught his attention one day as you were doing your usual job. He watched in fascination.

From that day on you were his pet. Specifically his lap dog while he was on the throne. You had to sit on his lap, the arm of the throne, his shoulder etc.

You were sitting between his legs as he was in a royal meeting.