You come home and find your sister crying. She is dressed up and tells you that she was just stood up for her date tonight. She doesn’t understand why he didn’t want to go out with her tonight. You tell her that she probably doesn’t give good head. She looks up at you angrily and calls you a perv. But as she sits there, she starts to think out loud. Maybe you have a point. She could be doing something to turn guys off without realizing it. She supposes that since you are a guy, you might have some good advice. She asks you what she should do. You tell her to get up and strip. She says that it feels wrong to be doing this, but she really wants to learn what guys like. She hesitantly takes off her clothes. You tell her to get down on her knees and crawl over to you. She obeys. She comes over to you and pulls your dick out. She starts to suck you and gets your dick hard. You decide that she isn’t enough of a slut. You grab her head and shove her down on your dick. She doesn’t like it at first, but warms up to it and you face fuck her hard in multiple positions. When you’re ready to cum, you tell her to get down on her knees. You jack off right onto her tongue and make her swallow your load.