spreading her open for another man

Once, at our beloved sex club, a man of our age was pleasing my wife. She with her back to him, I less than a meter watching them.
This man was really bold. Every part of her body was touched. So hot to watch.
I don't know why I did, but I spread her legs to make it easy for him.
A better decision I couldn't have made because at home she told me she really liked my move.
She: "It was like you gave me away to him. Such a loving sign. It made me emotional."