I unknowingly watched my stepson and stepsister engage in intimate acts, which aroused me to the point of climax upon witnessing their encounter

I was in the midst of a relaxing bath when I happened to glance out the window and saw my stepson and stepsister engaging in some intimate acts on the bed. The sight was so arousing that I couldn't help but reach for my throbbing manhood to relieve some of the intense desire coursing through me. As I watched the pair, I couldn't help but be drawn in by their passionate encounter, my eyes glued to every tantalizing move they made. The sight of my stepson's firm, yet gentle hands exploring every inch of my stepsister's body, his lips tracing a path of seduction down her neck and shoulders, was enough to push me over the edge. I found myself coming in my underwear, unable to resist the allure of the forbidden encounter unfolding before me.