Stepsibling's sexy encounter with my friend arouses me for masturbation

As I hit the gym daily, I've grown accustomed to my stepsister joining me. In the midst of our workout, she playfully teases me, causing my manhood to perk up. A few days later, I caught her in the act with my friend, their passion igniting a desire within me. Unable to resist, I undressed and joined them, my fingers exploring her luscious curves. She eagerly reciprocated, servicing me with a skill that left me breathless.Her tight, succulent ass guided my shaft, her moans echoing in the room. The sight of her being ravished from behind, her body writhing in pleasure, was a sight to behold. I couldn't resist the allure of her ample backside, my hands caressing the silky skin. The sight of her, bent over and taken, was the ultimate taboo, a fantasy come to life. Her moans filled the room, a testament to her pleasure. The encounter left me utterly drained, yet invigorated, a memory etched in my mind.