"Did mom tell you?" Maddie asked me suddenly, breaking my trance. She didn't slow her grinding.
It took me a minute to realize what she was talking about. I asked, "You mean that she had s*x with her brother?"
My sister frowned at me. Her lips were parted as she continued her forward and back movement. It was getting harder and harder to hold off the inevitable orgasm churning in my balls. She stared at me, panting loudly for a full minute. Then she whispered, "But did she tell you everything?"
A frown formed on my face. She nodded at me, as if she was reading my mind. What did she mean? What more was there to tell? Maddie sped up her grinding, her mouth opening more. She looked like she was about to c*m. Her p***y mashed harder against my c**k, pulling my own orgasm up to the surface.
