Fucking My Assistant While My Step-SON Watches

I have a worthless step-son that is obsessed with me, he is just like his step-father. A tiny dick, no motivation, no intelligence, nothing, a waste of space. I recently hired a new assistant, who just so happens to be my step-son's high school bully. One day after work I have him come with me to the house to pick up some paperwork, and my step-son sees who I have hired. He was clearly upset about it, but I don't care. Unfortunately, after that, he found some incriminating photos and messages on my phone. Now he knows that not only did I hire his bully, I also fuck him! He confront me about this, and I tell him exactly why I hired him (his big dick). My step-son refuses to believe anything I've said, so I tell him I'll invite over his bully and he can watch through the door. My assistant shows up and does his job perfectly, never knowing my step-son is watching the entire time as I talk down to him and cum all over his bully's dick.