Hey bro, I've got a favor to ask you. While we're alone, I need your help. See, I've been playing with my ass with my fingers and stuff but I really want to feel a real dick inside of my tight little butthole. Would you please get your cock out and fuck my ass before our parents come home? It can be our dirty little secret! Are you ready to be the most helpful brother ever and shove your hard cock up your sister's juicy ass and let her naughty little hole make you squirt a big load of hot cum? Good, I knew you were cool enough to trust with something like this.