Hey little brother, what's wrong? Why do you look so sad? I know you had a date tonight, you should be happy. Did it not go well?--I'm sorry...Tell me what happened. You didn't have sex? Have you ever had sex after a date? You're a virgin then... oh no, your cock hurts? That must mean you have blue balls, and there's only one way to fix that. As your big sister I have to take care of you, so I'll make sure that your cock stays healthy and empty all the cum out of your balls. You also must not know much about the female anatomy since you've never been fucked so I'll help you with that too. It's what a good big sister would do.