A taboo birth story - mom and son

be warned this is extremely sick and depraved! Mommy catches you jerking off to your ultrasound pics but she isn't mad she wants you to enjoy them as much as she did. You're a pervert just like she is and she loves it! All those years touching you really paid off... and today whilst jerking you off she decides to tell you all about her pregnancy and the birth of you her darling son. She talks about the amazing community of other sick moms she joined, what she wore in the labour room and much more. Naturally you get very hard and somommy decides it best for her to hop on and ride till you both climax!