The Simpsons Episode 8.19 Grade School Confidential

A casual conversation between Principal Skinner and Mrs. Krabappel leads to a torrid love affair that nearly destroys a fairly good public school. The educators use Bart as their go-between and beard, bribing him with a clean permanent record if he keeps their secret and continues to pass love notes back and forth for them. Eventually, Bart grows sick and tired of being Skinner and Krabappel's third wheel and exposes them to the world. Learning of the affair, Superintendent Chalmers fires Skinner and Krabappel, who take the opportunity to speak to the public and the media about their relationship. When everything is cleared up, the townspeople realize that the affair is hardly inappropriate, the two educators get their jobs back and continue sharing their love, albeit much more privately.