My stepmother and I touch his dick under the table

I Knew that my stepmother was not a saint. I know perfectly well that it is very whore and likes to fuck a lot, not able to control herself with the cocks. But I thought that would have been a limit with me because I am his step-son, but I was wrong. The other day we were all at the table playing cards when suddenly I felt his hand on my cock. I tried to control my expression because my father was there, but it was really difficult; you had me pulled out his cock from his pants and I was masturbating. And when my father is gone for a moment to answer a call, gave me a blowjob. When my father is gone, I could breathe and enjoy what he was doing.