When she finally leaves home, that is when the son starts to seduce or be seduced by the stepdad. As a gay guy, the mom in the porn does not initially suspect anything and perhaps even leave the son alone to bond and get along with the stepdad. Obviously, for the first one, it is infidelity because your stepdad is the lover of your mom. In gay porn, this is quite the popular one because of its many underlying fetishes such as infidelity, incest, and inappropriate power play.
Stepdad does not necessarily mean he is your blood dad-it is literally an unrelated boyfriend or husband of your mother. You would not want to discuss this at all with anyone in real life because it is deemed a taboo. One of the most popular porn kinks that nobody wants to talk about is stepdad porn.
