Six hours ago I watched my father having sex with our neighbors 19 year old son. I saw my naked father sat on our couch as Daniel sucked him off. Thinking back I should have left then, but I didn't. From where I was stood I went onto watch my super conservative dad, fuck the ass off Daniel as though his life depended on it. After fucking Daniel for over ten minutes in two different positions, I finally saw my own fathers fully erect cock as he ejaculated all over Daniels face. Sneaking out I waited until I knew my mom would home from her shift, before going back. I've not said anything and am now wondering if I should.