What was the event that disrupted Marc’s life?

The event that disrupted Marc's life occured one evening when he entered his father's office and discovered pornography (a video) on his father's laptop. The pron, however, wasn't the real disruptive, as Marc realized that he wasn't just watching porn.... he was watching his father participate in the video as an actor. When Marc’s mother heard Marc and his father arguing about the video and learned what was happening, the couple divorced and sold their home.