Question of a curious son

It all started one day after he had gotten home late after his eighteenth birthday party. He had just walked into his father’s house trying to keep from waking him up, knowing that if he did he would catch holy hell. As he was slowly slinking up the steps he heard a series of low moans coming from his father’s room. James didn’t think anything of it because his father had brought home women he dated before and had sex with them. Then he realized that it’s was only one voice coming from his father’s room and he decided to investigate. When he slowly cracked the door open he saw a sight that he would cherish for the rest of his life. He saw his dad completely nude and his nine inch dick with its glistening, purple head slowly being stroked by his father’s hands. Without his dad being aware of him he slowly put his hand down his pants and slowly started to jack himself off in rhythm to his father. As his father speed up he speed up and they ended up shooting their hot, sticky wads of cum all over the place. James realized that his father was getting up to wash off, and then he quickly went up to his room to strip and jump in bed so if his father checked it would seem like he had been there. During the night after his father had gone back to bed he decided to whip out his dick and start masturbating in his bed, and instead of using the image of this hot picture of two women eating each other out, he used the image of his father’s cock.