Therapy session with stepsister and mature doctor turns into a taboo threesome

During a routine visit to the hospital, things took an unexpected turn when I was mistakenly escorted to a therapy session with my step-sister. The mature doctor, unaware of our family dynamics, began his examination. Things heated up quickly, and before I knew it, we were indulging in a taboo threesome. The room was filled with passionate moans as the doctor explored my desires and my sister's. The experience was intense, leaving us all breathless and satisfied. It was a wild ride of pleasure that I won't soon forget.