Having Intimate Relations With My Stepsister In A Doggy Style Position

I stood open mouthed with my cock limp and useless. “Good lord no, it was hard enough getting her to marry Alan,” Agatha said, “Her mother said marry Alan and see Longhirst on the sly but she is too prim and proper for that so this time if she demurs we shall tie her down.”
“You expect me to fornicate lovelessly with your daughter in law,” I protested, “What sort of man do you think I am?”
“Just a man,” she said, “‘Tis well known your brains dangle between your legs”
“That madam is a slur and a lie,” I asserted. “What?” I blustered feigning surprise. “Then that is a great shame because I need to be with child with immediate effect,” she explained. I stood open mouthed with my cock limp and useless.