Stepsister and her boyfriend join me for a steamy bisexual threesome

After a long day, I returned to my stepsister's place and caught her in the throes of passion with her boyfriend. The sight of her being pleasured by his massive member stirred an insatiable desire within me. Unable to resist the erotic scene unfolding before me, I was overcome with a burning urge to join them. With a swift move, I freed my own throbbing member and positioned myself near her mouth, eager for her to take me in.She wasted no time, eagerly engulfing my hard shaft while her boyfriend continued to ravage her. The sight of her expertly servicing me only fueled my lust, driving me to penetrate her sweet pussy with my bare cock. The room filled with moans of pleasure as we engaged in a wild bisexual threesome, our bodies entwined in a passionate group encounter. The climax of our encounter saw her receiving a hot load in her mouth, marking the end of our intense session.