Your little sister plops down on your bed, looking cheerful but with a devious little glint in her eye. She tells you about how she went to her friends house and they practiced... sucking, with bananas and hot dogs. Her friend thinks she's SOO good at it, but your sister is confident she's the best. She asks you if she can use your cock to practice. She begs you to take it out, and when you hesitate, she takes it out herself. She does a great job sucking and licking your cock, making it messy with her spit. After you cum in her mouth, she just has one question- when can we have a blow job contest?