A sex act that can only occur on special occasions when you eat dinner with your
girlfriend and her mom at your girlfriend's house. When her mom goes into the kitchen to check on the food, you and your
girlfriend go up to her room and you bend her over the bed to
fuck her in the ass. When the mom comes up to see what all the noise is coming from, you put on a strap-on backwards style and fuck the mom in the ass to create the illusion of a train connector between two railcars.