I seize the opportunity to have sex with my stepsister while she's changing in the closet, and I penetrate her anus and ejaculate on her back

As I was rummaging through my closet, I stumbled upon my stepsister in the act of changing. Unable to resist the allure of her voluptuous curves, I swiftly took advantage of the opportunity to ravish her. Despite the taboo nature of our forbidden encounter, I was driven by an insatiable desire for her. With her back against the closet door, I positioned myself behind her, ready to explore the depths of her pleasure. After a brief moment of foreplay, I thrust into her tight rear, eliciting a gasp of surprise and pleasure. As I continued to penetrate her, she began to writhe in ecstasy, her body quivering with each powerful stroke. Despite her initial shock, she soon surrendered to the intense pleasure, her body convulsing in a powerful climax that left her gasping for breath. Finally, I reached my own climax, releasing my warm essence onto her back, marking the end of our illicit encounter.