I ejaculate on my stepmother's large buttocks when I discover her being ignored

I was lounging on the couch, enjoying some quality time with my step-sis, when she suddenly disappeared. My step-mom, who had been busy with her endless chores, seemed to have completely forgotten about her. I couldn't help but feel a little sorry for her, left alone and ignored. As I contemplated how to console her, my eyes were drawn to her ample rear, encased in a pair of alluring panties. The sight was too much for me to resist, and I found myself succumbing to the urge to climax on her. This wasn't just any ordinary release, it was a testament to my desire for her, a desire that I hoped would be reciprocated. I knew I had to be careful, not wanting to upset my step-sis or my step-mom, but the thrill of the forbidden only made the experience more enticing.