"Mommy's Boy" is an Adult Time porn series created to complement the popular lesbian-sex series "Mommy's Girl", only it is assigned to the Devil's Film label rather than Girlsway (featuring boy/girl sex content instead of girl/girl).
As telegraphed by the episode title, this segment goes kinky, with the focus on a fetish (and the actors Dee Williams and from the Gay Porn world Jayden Marcos play the scene straight, not as explicitly silly).
Jayden discovers on his stepmom's laptop a tab storing mother/son porn videos of a specialized type -about anal sex. When he confronts his mom, Dee is embarrassed but of course they decide to try out some backdoor sex together, and not merely gaping. And Jayden is the top, Dee the bottom in the scene, no pegging.