My wife LadyD kept her legs wide open while he scratches her clitoris with his nail.
Judging by her oohhhhs, aahhhhs and yesssssses, she is thoroughly enjoying herself.
It was so hot to watch it being shamelessly done by another man. Especially when she encouraged him with her 'yesssssses'.
They let me know my place by confronting me with it.
It was their game and I had to accept it. That's what made it so exciting.