Showing my step-son how to wank

I was just doing my usual chores. Then when I was on the landing I noticed my step-son's bedroom door wasn't closed properly. I head some strange noises so I took a peek. That is when I saw him masturbating. It was such an awful sight because clearly, he didn't know what he was doing. I then spent hours pondering what to do. I mean I don't want my step-son to injure himself due to being ill-informed. So I did what any loving stepmother would do and showed my boy how to wank his cock.