Once both faces were clean and shiny Nana asked, "So you let your son fuck all three of your holes?"
"Anytime he wants," she nodded.
"Even your ass?" Nana continued, her tone saying she couldn't fathom that being pleasurable.
"He loves reaming my ass, don't you, son?" she asked, looking up at me.
"I love all three of your fuck holes, Mother," I replied, "but yes, your asshole is super tight."
After a pause Mom asked Nana, "You've never been ass fucked?"
"No," she admitted. "Your father begged me to let him, but even though I loved his being my Master, I would never do that."
"Then you don't know...