They both knew what was about to happen, and were powerless to stop it. Becky notched her father’s cock-tip at the entrance to her cunny, and pushed down hard. “OW!” She felt a sharp pain as her vagina resisted the monster at its mouth. Try as she might, and as wet as she was, she just couldn’t get the fat cock head past her tiny opening.
Becky moved back and forth, side to side, pressing down from all angles, and it just wouldn’t go in. It hurt, and she felt the tears running down her face.
For his part, Bill laid there, letting her do the work. His prick was as hard as he could remember it ever being, but her opening resisted its invader valiantly. He could her her cries in the dark, and knew he was hurting her, which broke his heart.
However, he knew how much she wanted this to happen, and had to admit that he wanted it, too. He also knew from experience that his large penis was a challenge for a great many of his lovers, and her mother was no exception.