My stepbrother walks in on me and my stepdad having sex and he masturbates

I was in the middle of a steamy session with my stepdad when my stepbrother unexpectedly barged in. The sight of us in the throes of passion was too much for him to resist. He couldn't help but get aroused by the scene unfolding before him. Witnessing his step-sister getting pounded by his step-dad only fueled his desire. He hastily unzipped his pants and started pleasuring himself, his hand moving rhythmically as he fantasized about joining in. The sight of his stepsis getting ravished only made him more horny. He couldn't help but stroke his hard cock, imagining it would be his thrusting into her instead. The whole situation was incredibly arousing for all parties involved. It was a wild, taboo scene that left everyone breathless and craving for more.