We're stuck at home together on a Friday night and I have nothing to do, so, like a true big sister, I start picking on you. There's a rumor going around school that my brother has a tiny little dick. Is it true? I offer to take my top off in exchange for you taking off your pants. You're embarrassed by your tiny dick, but you're eager to see my gorgeous tits. There's a reason it's so rare for me to be free on a Friday night: I have some of the nicest boobs in school. You drop your pants and I immediately start giggling. It is tiny! I guess I'm the only well-endowed one in the family. You know, your dick is so small that I doubt it even counts as taboo if I play with it. I give you a thorough dick examination, wondering why it doesn't get hard until I realize that it is! I get curious about how such a little dick cums, so I start titty fucking you, my huge tits swallowing your little cock until you have a precious, tiny orgasm, shooting your clear load all over me as I tease you