A The Carlyle Saga Story Lisa spies on her parents having sex. She mentions it to Grandpa and he joins her in spying. Quickly they conclude that there are more fun things to do than looking through a keyhole.
When Fawn's brother drops by one evening announcing that he and his wife are splitting up because of her cheating, Fawn and him get it on. When Fawn confronts the sister-in-law, they also get it on and they have a happy 3some. But when the brother and wife decide to get back together, Fawn is left out and she seeks to have her sexual needs taken care of by a taxi-cab driver.