you don't see this too often, the wedding ring kinda implies she has a husband who she's cheating on with her son's friend, plus she's screwing around behind said friend's back. from the looks of the last pg it seems her son found out, are we going down the incest route?
In gentle way, the son may ask why she fucked that man while showing her the video, if she would say it was because of sexual frustration or/and lack of marriage love life then he may say he would take care of that, and she stop fucking around, good end incest route. Or he may out right rape her, blackmail her with the video of her fucking that man. Or he would just keep spying on her and continuous filming her fucking around.