You'll start it by you wearing casual house clothing and you're just watching TV on the couch when your step-son comes up next to you asking you about your day. He then takes his dick out and you just start by jerking him off (you can use a dildo for this point of the scene) casually and you two are still just talking normally. Your step-son asks you can take you to take your breast out while he sucks on your breasts while you're still jerking him off (you can put the dildo away at this point) while watching TV commenting on what you're watching. You start laying down taking your bottoms off and directing him inside you (missionary). After a bit, you start getting up and kneel in front of the coach to titty fuck him (bring back out the dildo if you find it easier to do this scene with). To end it bend over the couch (no dildo for this scene) and tell him to fuck you from behind and after a minute or so after he cums in you making multiple thrusts when doing it. Call me babee boy, sweet boy, and/or good boy. You can have the TV on if you feel like it would make the video easier or better but don't have it on too loud. use your phone like watching the TV in the video as a way of focusing your interest on something else during parts of sexual acts a couple of times. You can go back and forth in between the phone and TV if you want what's ever easier. Like ignore the sexual feeling but not ignore your step-son. I'm thinking of wanting a video like that after this one you make. The TV and phone would be used to strike a conversion, a topic on what's going on, or general talking out loud about what one is watching or reading. You could even put on a show you watch and talk about that. Just whatever you find easier to talk about while filming to make it seem more natural for you.