My little sister in law was amazing, she never let our affair slip.  My wife never knew how often we would get each other off.  Since I was fixed, I never even had to pull out.  She had this amazing way of massaging my balls when I fucked her. It was her way of coaxing the cum out of me.  She would continue to do it as I fucked her deep. She would make sure that she continued to do it even as I cam to make sure that I had an amazing release deep inside of her.  We both loved every minute of our special time together.