I blindfolded my wife one night during s** and let a friend have s** with her. He was waitng in the spare room and came out when i gave a special code we had. She was told not to take off the blindfold until i said she could and didn't even realise it wasn't me having s** with her. I watched him take her from behind for 20 min before c****** inside her. He went back to the spare room before i took off the blindfold and asked her if she enjoyed it ? She said she loved it and to this day still doesn't know my friend had s** with her. I wish i could tell her my little secret.