Watch Grandparents Teaching Teens 4 for Free: How to Stream the Movie Online at 123Movies. . Jenny Wild is busy with her fitness exercises when Grandma comes to see if she's stretching everything properly. Now that we're having such a good time, maybe it's better to take off your pants, so we can have some horny sex with each other. That's just the first scene. This is followed by three other young girls who receive sex lessons from an older couple. And grandpa? He is enjoying it the most!