Hidden camera caught them when they started to make out and the guy couldn't take his hands away of her tight ass. They started to fuck and their dog stumbled on the bed. That poor critter got scared from all the moaning and thrusting while they fucked in a sideways pose.
This is a big brother video from some show where the horny participants fucked under a blanket, trying to hide the deed from curious television audience. Did you notice how those silly big brother shows are getting more and more frisky with each season?