I agree, love the dialog and setup, and love the x-ray cam as well.
I just checked again, and really everything looks amazing, just in the penetration scene animation I'm not sure if we're looking at the mom's clitoral hood being spread open, and she doesn't have the button of her clitoris or the slight hole of her urethra below that showing, right above her penetrated vaginal canal? Or maybe that's too much anatomy, it's a niggling point. The scene looks great otherwise and I imagine getting the perspectives right on top of the animation can't be easy.