Stepping into her bedroom, I couldn't resist the temptation to sneak up on my step sister's best friend while she was with my step sis. Luckily for me, she was more than willing to play along. We started slow at first, but soon found ourselves lost in a wild session of fucking without a care in the world. The thrill of getting away with it made it even better. I took her from behind in doggystyle, making sure every inch of my cock was buried deep inside her before switching to cowgirl as she rode me with determination. As we both approached our limits, I erupted in a hot torrent of cum that filled her mouth and left us both panting for breath.