Step sister's naughty suggestion for a steamy encounter

The day had been long and tiring for our young protagonist, and all he wanted was to unwind at home with his girlfriend. Little did he know, his step sister had been harboring some naughty thoughts about him. When he finally got home, his girlfriend playfully suggested that they should "get his buddy to come over and watch them do the dirty deed". His step sister, ever the vixen, decided to add her own twist to the plan. She teased him with a steamy striptease, leading him to the bedroom where his girlfriend was already waiting. The tension was palpable as she dropped to her knees, unzipping his pants to take him in her mouth. The sight of his step sister joining in only made the encounter more thrilling. As he thrust into his girlfriend's eager mouth, his step sister climbed on top, taking him deep inside her. The room echoed with their moans as he pounded her hard, his step sister reveling in the pleasure. Finally, he reached his climax, filling her with his hot load.