Seeing her young shy step-sister sitting in the room in a very depressed mood, the big-tits blonde step-sister comes to the young man and asks what’s wrong. When she says she can help him if he tells her his troubles, she responds more shyly than ever before, comes to him in a sexy way and says seriously that it’s time for her to learn the truth. When she shyly says that she ejaculated prematurely, she gives her a sex diploma that will teach her everything to not ejaculate prematurely, with her cocky body, by being a woman.