You spy on us having quick doggy style sex - Diana and Daniel

You're sitting in the corner of the couch and your feet are up on the armrest, your hand on your dick, watching as Diana and Daniel start to make out on the couch. You're stroking your cock as they start to get naked, Diana sitting on Daniel's lap and his hands grabbing her hips. You watch as they go to a standing position and he slides his cock into her pussy. She starts to moan, looking back at you and grinning, her eyes sparkling. You feel your cock twitch and you take your hand off of it, feeling like you've gotten your fix for the day.