Kevin received a porn video of his friends from the WhatsApp group, without much thought he opens the video to see, he is so excited about the video that he does not remember locking his bedroom door and his sister Lucy comes in and catches Kevin watching porn video.Kevin takes a deep fright and Lucy realizes, but begins to talk and asks what he does when watching this type of video, inexperienced Kevin explains that only watches the video and does nothing too much.Lucy is a malicious sister and asks if Kevin does not masturbate after watching a porn video and Kevin innocently asks what it means to masturbate, Lucy finds it funny that her little brother watches porn videos and does not know how to masturbate.Noting that her little brother is an inexperienced young man, Lucy decides to show Kevin how a boy masturbates, but Lucy wants to teach Kevin with her own hands, because in addition to wanting to teach her little brother she is also horny.Lucy tells Kevin to take off his clothes, but he is very shy, he takes off his clothes in the living room and returns to the bedroom. Lucy is amused by Kevin's shyness, she begins to undress as well to leave her little brother more at ease. She tells Kevin to lie down because she's going to teach him how to masturbate.Lucy starts to work with her hands and Kevin is tense and cock soft, but soon realizes that it is very good and already cock hard and Lucy realizes that his little brother is getting comfortable and says he likes to masturbate it. Lucy teaches several movements and makes them all horny, she seems to like Kevin more and he is enjoying Lucy's movements that get more and more intense.Lucy explains that an hour will come when he will cum it, but Kevin does not understand and Lucy explains what it is to cum and says he wants to see his little brother cuming in his hands to finish his lesson on how to masturbate.Lucy intensifies her movements and realizes that her little brother is getting more and more close to cum, she does not stop until Kevin cuming and when this happens Lucy is extremely happy and excited, she says she is proud to see the how much your little brother can cum and says that whenever he is in any doubt just ask her that she will always help you.