Dont pay attention to the photo. Brother tricks blindfolded sister into fucking her

I am looking for a video i watched years ago. Its about a sister who teaches her (brother step brother?) to be "cool" and less nerdy. She tells him to do something unexpected and impressive (or something along those lines). She then walks out of his room because she is expecting a booty call from her boyfriend. She is blindfolded waiting for her boyfriend to come. The brother decides to be"cool" and locks the front door of their house so the boyfriend cant enter. The brother then goes to his blindfolded sister and fucks her. She thinks its her boyfriend fucking her. Any help would be appreciated thanks!